单选题The biggest advantage of this product is that ______.A it will be faster and cheaper than manual laborB it can climb mountainsides, drill holes, insert bars and cementC it can collect data on the slope’ s stabilityD it can drill without a human being o
题目
单选题
The biggest advantage of this product is that ______.
A
it will be faster and cheaper than manual labor
B
it can climb mountainsides, drill holes, insert bars and cement
C
it can collect data on the slope’ s stability
D
it can drill without a human being on board
相似考题
参考答案和解析
正确答案：
D
解析：
从第二段The idea is to operate a machine far away that can drill with out a human being on board一句以及第一段讲滑坡人工抢险的危险，可知这种产品的最大优点就是无人操作的安全性。
从第二段The idea is to operate a machine far away that can drill with out a human being on board一句以及第一段讲滑坡人工抢险的危险，可知这种产品的最大优点就是无人操作的安全性。
更多“单选题The biggest advantage of this product is that ______.A it will be faster and cheaper than manual laborB it can climb mountainsides, drill holes, insert bars and cementC it can collect data on the slope’ s stabilityD it can drill without a human being o”相关问题
-
第1题：
Many experts believe that in the new world of artificial intelligence（AI）human beings will still be needed to do the jobs that require higher-order critical,creative,and innovative thinking and the jobs that require high emotional engagement to meet the needs of other human beings.The 1 for many of us is that we do not excel at those skills because of our natural cognitive and emotional tendencies:We are confirmation-seeking thinkers and ego-affirmation-seeking defensive reasoners.We will need to overcome those tendencies 2 take our thinking,listening,relating,and collaborating skills to a much higher level.This process of 3 begins with changing our definition of what it means to"be smart."4,many of us have achieved success 5 being"smarter"than other people as 6 by grades and test scores,beginning in our early days in school.AI will change that because there is no 7 any human being can outsmart,8,IBM's Watson,at least without augmentation,Smart machines can process,9,and recall information faster and better than we humans.10.AI can pattern-match faster and produce a wider array of alternatives than we can.AI can even learn faster.In an age of smart machines,our old definition of what makes a person smart doesn't 11.What is needed is a new definition of being smart,one that 12 higher levels of human thinking and emotional engagement.The new smart will be determined not by what or how you know 13 by the quality of your thinking,listening,relating,collaborating,and learning.Quantity is 14 by quality.We will spend more time training to be open-minded and learning to update our beliefs in 15 to new data.We will practice 16 after our mistakes,and we will invest more in the skills traditionally 17 with emotional intelligence.The new smart will be about trying to overcome the two big 18 0f critical thinking and team collaboration:our ego and our fears.Doing so will make it easier to perceive reality as it is,rather than as we 19 it to be.In short,we will embrace humility.That is 20 we humans will add value in a world of smart technology.
1选？A.controversy
B.challenge
C.opportunity
D.compromise答案：B解析：本题考查上下文语义。those skills回指上文“Al时代仍然需要的人类技能：更高层次的批判性、创造性和创新性思维以及高度的情感投人”，空格后“我们不擅长这些技能”这一情况应该是“AI时代我们亟需克服的问题”．B.challenge符合文意。 -
第2题：
共用题干
Black Holes
1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists
have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer
burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,
hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.
2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these
explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough
(should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact
every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends
up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S
only a fraction of an inch!
3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember
that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large
star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not
change because the newly formed black hole contains exactly the same amount of mass as when it was a star,
only this time its mass is totally contracted that it can end up as no bigger than a state.
4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of
relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black
holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But
astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes
might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger
process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black
holes as helpful in learning how galaxies began to form.Albert Einstein's theory of relativity helps to prove__________.
A:the existence of black holes
B:the creation of new entities
C:the same amount of mass
D:an fraction of an inch
E:a fraction of an inch
F:the tiniest particle答案：A解析：第一段描述了什么是黑洞，以及它产生的缘由―巨型恒星爆炸，并叙述了恒星爆炸的 原因和简要过程。再看选项，只有F项符合题意。
第二段的主要内容是：恒星来自由氢气、其他气体和一些金属组成的恒星；当这些物质 爆炸时，恒星就变成了质量与原先的恒星等同的黑洞，恒星的每个碎片都被重力压缩成极小的 颗粒。观察选项，似乎E、F两项都可选，但一则上一小题只能选F项，二则此段虽也讲了黑洞 是怎么形成的，但比较侧重黑洞形成过程中，原来的恒星变成极小的颗粒。由第三段最后一句 也可知，这些颗粒的质量总和与原来的恒星一样，正是这些颗粒使黑洞有极大的吸附性，而成 其为“黑洞”。因此，黑洞就是由这些极小却质量巨大、吸附性极强的颗粒构成的。故选E。
第三段描述了黑洞极大的吸附性，及其具有如此大的吸附性的原因。黑洞形成后，周 围一定距离内的几乎一切东西都会被吞噬而难以逃脱，故选A。
第四段主要讲黑洞存在的依据及科学家们的研究和设想。故选B。
由第一段第二句“...black holes come from an explosion of huge stars.”可知答案。
由第二段第二句后半部分“...the gravity starts to compact every piece into the tiniestparticle”可知答案。
由第三段最后一句“…the newly formed black hole contains exactly the same amount of mass as when it was a star...”可知答案。
由第四段第一句话可知答案。 -
第3题：
共用题干
Black Holes
1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists
have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer
burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,
hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.
2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these
explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough
(should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact
every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends
up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S
only a fraction of an inch!
3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember
that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large
star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not
change because the newly formed black hole contains exactly the same amount of mass as when it was a star,
only this time its mass is totally contracted that it can end up as no bigger than a state.
4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of
relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black
holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But
astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes
might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger
process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black
holes as helpful in learning how galaxies began to form.Paragraph 1________
A:What Happens to the Objects Around a Black Hole?
B:Is There Proof That Black Holes Really Exist?
C:How Were Black Holes Named?
D:What Are Different Types of Black Holes?
E:What Are Black Holes Made of?
F: How Are Black Holes Formed?答案：F解析：第一段描述了什么是黑洞，以及它产生的缘由―巨型恒星爆炸，并叙述了恒星爆炸的 原因和简要过程。再看选项，只有F项符合题意。
第二段的主要内容是：恒星来自由氢气、其他气体和一些金属组成的恒星；当这些物质 爆炸时，恒星就变成了质量与原先的恒星等同的黑洞，恒星的每个碎片都被重力压缩成极小的 颗粒。观察选项，似乎E、F两项都可选，但一则上一小题只能选F项，二则此段虽也讲了黑洞 是怎么形成的，但比较侧重黑洞形成过程中，原来的恒星变成极小的颗粒。由第三段最后一句 也可知，这些颗粒的质量总和与原来的恒星一样，正是这些颗粒使黑洞有极大的吸附性，而成 其为“黑洞”。因此，黑洞就是由这些极小却质量巨大、吸附性极强的颗粒构成的。故选E。
第三段描述了黑洞极大的吸附性，及其具有如此大的吸附性的原因。黑洞形成后，周 围一定距离内的几乎一切东西都会被吞噬而难以逃脱，故选A。
第四段主要讲黑洞存在的依据及科学家们的研究和设想。故选B。
由第一段第二句“...black holes come from an explosion of huge stars.”可知答案。
由第二段第二句后半部分“...the gravity starts to compact every piece into the tiniestparticle”可知答案。
由第三段最后一句“…the newly formed black hole contains exactly the same amount of mass as when it was a star...”可知答案。
由第四段第一句话可知答案。 -
第4题：
共用题干
Nuclear Power and Its Danger
Nuclear power's danger to health,safety,and even life itself can be summed up in one word:radiation.
Nuclear radiation has a certain mystery about it,partly because it cannot be detected by human senses.
lt can't be seen or heard,or touched,or tasted,even though it may be all around us.There are other things like that.For example,radio waves are all around us but we can't detect them,sense them,without a radio receiver.Similarly,we can't sense radioactivity without a radiation detector.But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels,radiation can kill an animal or human being outright by killing masses of cells in vital organs.But even the lowest level of radiation can do serious damage.There is no level of radiation that is completely safe.If the radiation does not hit anything important,the damage may not be significant．This is the case when only a few cells are hit,and if they are killed outnght.Your body will replace the dead cells with healthy ones.But if the few cells are only damaged,and if they reproduce themselves,you may be in trouble.They reproduce themselves in a deformed way.They can grow into cancer.Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation.Serious damage can be done without the victim being aware at the time that damage has occurred.A person can be irradiated and feel fine,then die of cancer five,ten,or twenty years later as a result.Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.
Radiation can hurt us.We must know the truth.Radiation1 can cause serious consequences even at the lowest level______.
A:when it kills few cells
B:if it damages few cells
C:though the damaged cells can repair themselves
D:unless the damaged cells can reproduce themselves答案：B解析：由文章第一段“Nuclear power ' s danger to health , safety , and even life itself can be summed up in one word : radiation.”可知，核能对人类健康、安全甚至生命造成的威胁可归纳为一个词：核辐射。故选C。
由文章第三段第二句话可知，即使是强度最低的核辐射也会造成严重伤害。接下来作者对此从两方面进行说明，其中第二方面，即第七、八、九句话说，如果细胞仅仅是被破坏了，它们可能会再生，发展为畸形，并最终生成癌细胞，对人体造成危害。故选B。
由文章第三段第四句话“If the radiation does not hit anything important , the damage may not be significant.”可知，如果核辐射没有破坏重要的细胞，这种伤害可能不是致命的。significant意为“致命的”，与fatal（致命的）意思相近。故选A。
由文章第三段第一句话可知，选项A（杀死主要器官里的大量细胞，导致人或动物立刻死亡）是正确的。由文章第三段最后两句话可知，选项B（损伤细胞，致使细胞多年以后发生癌变）是正确的。由文章最后一段最后一句话可知，选项C(影响我们后代的健康）是正确的。故选D。
题干的意思是能从文章中推断出的最恰当的陈述是：A．预防核辐射的重要性再强调也不过分；B．辐射的秘密还没有揭开；C．癌症主要是由辐射引起的；D．辐射可能伤害那些意识不到辐射危害的人。文章通篇都在讲核辐射的危害以及可能导致的严重后果，由此可推断出A项正确。故选A。 -
第5题：
单选题As they use energy only for motion, a snake can live longer without food than a human being。Athey use
Bfor
Cwithout food
Dthan
正确答案： C解析： -
第6题：
单选题Which of the following is NOT an advantage of computer newspapers?AThey are cheaper than traditional newspapers.
BThey are very convenient to use.
CYou can get more information from them quickly.
DYou can easily save information for future use.
正确答案： A解析：
按照常识可知，传统意义的报纸肯定要比新型的电脑报纸便宜。而且选项B、C、D在文章中都有体现。所以根据常识就可以得到答案为A选项。 -
第7题：
问答题Tanya can swim faster than Jack but slower than Sally. Harry usually swims faster than Jack, sometimes swims faster than Tanya, but never swims faster than Sally. Who is the slowest swimmer?正确答案： Jack.解析：
在本题中，Tanya比Jack游得快，Harry经常比Jack游得快，而Sally比所有人都游得快，所以Jack是游泳最慢的一个。 -
第8题：
多选题Which two statements about subqueries are true? （）AA single row subquery can retrieve data from only one table.
BA SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
CA SQL query statement can display data from table B that is referred to in its subquery, without including B in its own FROM clause.
DA single row subquery can retrieve data from more than one table.
EA single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
FA multiple-row subquery cannot be used in an INSERT statement to insert multiple rows at a time.
正确答案： A,F解析： 暂无解析 -
第9题：
单选题What is the purpose in writing this text?ATelling people how serious the damage caused by landslides is.
BTelling people that sending workers to stabilize mountainsides is a risky job.
CIntroducing a product that can be used to stabilize mountainsides.
DShowing people how to use a new product.
正确答案： A解析：
本文作者首先介绍了山体滑坡的危害，又说明了普通的防护方法的不足，最后向大家推荐了一种新型的机器人，利用这种新型的滑坡抢险产品，可以有效地防止危害的产生。所以主要的目的是介绍一种用于加固山体的产品。 -
第10题：
单选题It’s hard to get data on cloud cover because______.Athe information from satellites is useless.
Brecent satellite data is not enough.
Chuman observations are less acute than satellite data.
Dsatellite data can’t he combined with human observations.
正确答案： C解析：
事实细节题。由题干信息定位至第四段开头。由第二句可知获取关于云量的数据的难度在于B信息不足，并非useless，故排除A；第四段第三句提及the two sets were surprisingly in sync，故排除C；第四段第三句Clement and her colleagues combined recent satellite data with human observations，而非两者不能结合，故排除D。 -
第11题：
单选题What does the robot look like?AA human being.
BA spider.
CA truck.
DA drill.
正确答案： C解析：
根据第二段第四句话，The robot，a large radio-controlled four-legged mechanical spider可知，这种新型的产品像一只大蜘蛛。所以正确的答案为B。 -
第12题：
共用题干
Black Holes
1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists
have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer
burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,
hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.
2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these
explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough
(should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact
every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends
up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S
only a fraction of an inch!
3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember
that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large
star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not
change because the newly formed black hole contains exactly the same amount of mass as when it was a star,
only this time its mass is totally contracted that it can end up as no bigger than a state.
4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of
relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black
holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But
astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes
might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger
process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black
holes as helpful in learning how galaxies began to form.When a large star explodes,the gravity compacts every piece into______.
A:the existence of black holes
B:the creation of new entities
C:the same amount of mass
D:an fraction of an inch
E:a fraction of an inch
F:the tiniest particle答案：F解析：第一段描述了什么是黑洞，以及它产生的缘由―巨型恒星爆炸，并叙述了恒星爆炸的 原因和简要过程。再看选项，只有F项符合题意。
第二段的主要内容是：恒星来自由氢气、其他气体和一些金属组成的恒星；当这些物质 爆炸时，恒星就变成了质量与原先的恒星等同的黑洞，恒星的每个碎片都被重力压缩成极小的 颗粒。观察选项，似乎E、F两项都可选，但一则上一小题只能选F项，二则此段虽也讲了黑洞 是怎么形成的，但比较侧重黑洞形成过程中，原来的恒星变成极小的颗粒。由第三段最后一句 也可知，这些颗粒的质量总和与原来的恒星一样，正是这些颗粒使黑洞有极大的吸附性，而成 其为“黑洞”。因此，黑洞就是由这些极小却质量巨大、吸附性极强的颗粒构成的。故选E。
第三段描述了黑洞极大的吸附性，及其具有如此大的吸附性的原因。黑洞形成后，周 围一定距离内的几乎一切东西都会被吞噬而难以逃脱，故选A。
第四段主要讲黑洞存在的依据及科学家们的研究和设想。故选B。
由第一段第二句“...black holes come from an explosion of huge stars.”可知答案。
由第二段第二句后半部分“...the gravity starts to compact every piece into the tiniestparticle”可知答案。
由第三段最后一句“…the newly formed black hole contains exactly the same amount of mass as when it was a star...”可知答案。
由第四段第一句话可知答案。 -
第13题：
共用题干
Black Holes
1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists
have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer
burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,
hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.
2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these
explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough
(should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact
every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends
up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S
only a fraction of an inch!
3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember
that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large
star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not
change because the newly formed black hole contains exactly the same amount of mass as when it was a star,
only this time its mass is totally contracted that it can end up as no bigger than a state.
4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of
relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black
holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But
astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes
might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger
process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black
holes as helpful in learning how galaxies began to form.Black holes are formed after_________.
A:the existence of black holes
B:the creation of new entities
C:the same amount of mass
D:an fraction of an inch
E:a fraction of an inch
F:the tiniest particle答案：D解析：第一段描述了什么是黑洞，以及它产生的缘由―巨型恒星爆炸，并叙述了恒星爆炸的 原因和简要过程。再看选项，只有F项符合题意。
第二段的主要内容是：恒星来自由氢气、其他气体和一些金属组成的恒星；当这些物质 爆炸时，恒星就变成了质量与原先的恒星等同的黑洞，恒星的每个碎片都被重力压缩成极小的 颗粒。观察选项，似乎E、F两项都可选，但一则上一小题只能选F项，二则此段虽也讲了黑洞 是怎么形成的，但比较侧重黑洞形成过程中，原来的恒星变成极小的颗粒。由第三段最后一句 也可知，这些颗粒的质量总和与原来的恒星一样，正是这些颗粒使黑洞有极大的吸附性，而成 其为“黑洞”。因此，黑洞就是由这些极小却质量巨大、吸附性极强的颗粒构成的。故选E。
第三段描述了黑洞极大的吸附性，及其具有如此大的吸附性的原因。黑洞形成后，周 围一定距离内的几乎一切东西都会被吞噬而难以逃脱，故选A。
第四段主要讲黑洞存在的依据及科学家们的研究和设想。故选B。
由第一段第二句“...black holes come from an explosion of huge stars.”可知答案。
由第二段第二句后半部分“...the gravity starts to compact every piece into the tiniestparticle”可知答案。
由第三段最后一句“…the newly formed black hole contains exactly the same amount of mass as when it was a star...”可知答案。
由第四段第一句话可知答案。 -
第14题：
Many experts believe that in the new world of artificial intelligence（AI）human beings will still be needed to do the jobs that require higher-order critical,creative,and innovative thinking and the jobs that require high emotional engagement to meet the needs of other human beings.The 1 for many of us is that we do not excel at those skills because of our natural cognitive and emotional tendencies:We are confirmation-seeking thinkers and ego-affirmation-seeking defensive reasoners.We will need to overcome those tendencies 2 take our thinking,listening,relating,and collaborating skills to a much higher level.This process of_3 begins with changing our definition of what it means to"be smart."4.many of us have achieved success 5 being"smarter"than other people as 6 by grades and test scores,beginning in our early days in school.AI will change that because there is no 7 any human being can outsmart,8.,lBM's Watson,at least without augmentation.Smart machines can process,9,and recall information faster and better than we humans.10,AI can pattern-match faster and produce a wider array of alternatives than we can.AI can even learn fasrer.In an age of smart machines,our old definition of what makes a person smart doesn't 11.What is needed is a new definition of being smart,one that 12 higher levels of human thinking and emotional engagement.The new smart will be determined not by what or how you know 13 by the quality of your thinking,listening,relating,collaborating,and learning.Quantity is 14 by quality.We will spend more time training to be open-minded and learning to update our beliefs in 15 to new data.We will practice 16 after our mistakes,and we will invest more in the skills traditionally 17 with emotional intelligence.The new smart will be about trying to overcome the two big 18 0f critical thinking and team collaboration:our ego and our fears.Doing so will make it easier to perceive reality as it is,rather than as we 19 it to be.In short,we will embrace humility.That is 20 we humans will add value in a world of smart technology,13选？A.but
B.or
C.rather
D.and答案：A解析：本题考查句内语义逻辑。空格后“思考、倾听、联系、合作和学习的质量”是空格上句“更高层次的人类思考和情感投入能力”的同义表达。上文已知“聪明的新定义看重这些品质”，所以本句中，新型的聪明应该由思考、倾听等的质量决定，故空格部分not by what or how you know____by．．．应表示“否定前者，肯定后者”的取舍逻辑，not…bu L…表示“不是……，而是……”，故A.but符合文意。C.raiher表示取舍逻辑时，需用于not.…but rather.，，结构中，故排除。 -
第15题：
Which two statements about subqueries are true? （）
- A、A single row subquery can retrieve data from only one table.
- B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
- C、A SQL query statement can display data from table B that is referred to in its subquery, without including B in its own FROM clause.
- D、A single row subquery can retrieve data from more than one table.
- E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
- F、A multiple-row subquery cannot be used in an INSERT statement to insert multiple rows at a time.
正确答案:D,F -
第16题：
单选题“Mozart’s can” underlined in Paragraph 2 refers to.Ahis human feelings can be understood
BMozart’s music can be analyzed carefully
Chis harmonies, rhythms, etc. can be separated from one another
Dhis musical language can be separated from his personality
正确答案： B解析：
推断题。第一段指出作曲家的语言都很难从精神和敏感性中分离出来，但同时提到“except by pedantic analysis…of the artist who happens to be expressing himself through them”。第二段第一句指出“但这恰好是问题所在；就我所知，莫扎特就能”，由此可知此处指莫扎特能将他的音乐语言同自己的性格分隔开来，故选项D为正确答案。 -
第17题：
单选题What’s the advantage when using the satellites?（）AThe message can be directed to the desired location
BThe message can follow the earth‟s curvature
CThe quality of message can not be affected by climatic
Dthe range of the message extend and the quality of reception is improved
正确答案： D解析： 暂无解析 -
第18题：
单选题Which of the following statements is NOT true about mass communication?AIt can reach no further than human voice.
BIt can reach a large audience.
CIt is rapid and efficient.
DIt can be trusted.
正确答案： B解析：
最后一段指出思想传播的速度、距离和受众都发生了变化，大约200年前，人们所说的话并不能比其声音传播的更远，而非指的是mass communication（大众传媒）。 -
第19题：
单选题Which statement is TRUE with respect to the elasticity of nylon mooring lines?（）.ANylon can stretch over forty percent without being in danger of parting
BNylon can be elongated by one-hundred percent before it will part
CNylon will part if it is stretched any more than twenty percent
DUnder load，nylon will stretch and thin out but will return to normal size when free of tension
正确答案： D解析： 暂无解析 -
第20题：
单选题Most drill ships and barges have a walled opening below the derrick，open to the water’s surface and through which various drilling tools can pass down to the sea floor called a （）.Amoon pool
Bspider deck opening
Cpontoon
Dkeyway
正确答案： C解析： 暂无解析 -
第21题：
单选题The advantage of the control equipment is（）Athat the transmitter is on the bridge
Bthat local manual control can be achieved
Cthat remote control can be achieved
Dsimple in construction and reliable in operation
正确答案： D解析： 暂无解析 -
第22题：
单选题Which statement is true about the loss of system-critical data files in ARCHIVELOG mode？（）AThe data files can be recovered till the last committed transaction.
BThe data files can be recovered without shutting down the database.
CThe data file is taken offline automatically； the database remains open.
DThe data files can be recovered to the time of the most recent backup.
正确答案： B解析： 暂无解析