单选题The reference to pieces of debris in Passage 1 (line 3) is used to ______.A highlight the potential uses of stone implementB contrast this early innovation with those of later generationsC suggest that these devices are man's greatest achievementD emph

题目

单选题

The reference to pieces of debris in Passage 1 (line 3) is used to ______.

highlight the potential uses of stone implement

contrast this early innovation with those of later generations

suggest that these devices are man's greatest achievement

emphasize the significance of the creation of these tools

imply that these tools were made from inferior materials

相似考题

1.单选题Based on the information in the passage, which of the following statements is most likely to be true?A Both host parents work full time.B The author was raised speaking French.C The host parents are younger than age 40.D The host family attends church regularly.E The author is a senior in high school.

2.问答题When looking at satellite photographs of the area affected by Hurricane Katrina, the effects of the massive storm are　　　　　A　　　　　　　　　　　　　　　　　　　　　　　　B　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Cclearly visible. No error　　D　　　　　　　 E

3.单选题The author implies that medieval Italians believed the giraffe and camel to have in common which of the following traits?I. speedII. countenanceII. wisdomA I and IIB I and mC II onlyD II and IIIE III only

4.单选题Two polygons must congruent if ______.A they are both regularB they have the same number of sidesC their corresponding sides and angles are equalD their corresponding sides are equalE they have the same shape

参考答案和解析

正确答案： E

解析：
文中提到“pieces of debris were deliberately reworked into tools”，接着提到工具的创造是人类进化的一个转折点，故选D项，是为了强调工具的创造的重大影响。

更多“The reference to pieces of debris in Passage 1 (line 3) is u”相关问题

第1题：

单选题
How many different four-digit integers can be formed using the digits 3, 4, 5, 6, 7, 8, 9 if the tens digit is 5 and no digit is repeated within an integer?
A
16
B
45
C
63
D
120
E
840

正确答案： A
解析：
首先需要想一下每个位置有几种选择，然后将这些选择相城可得出结果。因为十位数上数字已经确认定，所以只能有一种选择，又因为一个数中3, 4, 5, 6, 7, 8, 9不能重复，个位上有6中选择，那么百位上和千位上则分别有5种和4种选择，故总的可能为4×5×1×6=120种。
第2题：

单选题
Which of the following revisions of sentence 7 most clearly and logically introduces the second paragraph?
A
This historical episode is something that all students should learn about in school.
B
Understanding this phenomenon may help students to improve their studies.
C
Nevertheless, this episode is something that all students should know.
D
Understanding this episode requires a more thorough understanding of its historical setting.
E
Many have tried to understand this phenomenon, but few have succeeded.

正确答案： E
解析：
第一段话以对那个思想的描述结尾。第二段开头阐释了学生怎样在日常生活中体验那个思想的，并进一步解释它是如何帮助学生们度过思维冷却期。B选项是对这段话内容的引入，因为它解释了会运用这个现象的学生能提高他们的学习。
第3题：

单选题
Mrs. Barnum’s students had just finished listening to her boring lecture which made them happy.
A
listening to her boring lecture which made them happy
B
listening to her happily boring lecture that was over
C
listening to her boring lecture, happy that it was over
D
happily listening to her boring lecture
E
being happy at her boring lecture being over

正确答案： C
解析：
A，B，D项中都含有修饰上的错误。A和D项中的“happy”与“boring”相矛盾。B项中的将讲座形容为“happily boring”不合理。E项中的“happy at”不是固定搭配。只有C项表述的意思正确。
第4题：

单选题
By how much does the sum of the roots of the equation (x+1) (x-3) = 0 exceed the product of its roots?
A
1
B
2
C
3
D
4
E
5

正确答案： B
解析：
If (x+1)(x-3)=0, then x+1=0 or x-3 = 0. Hence, x = -1 or x = 3. The sum of these roots is -1+3 or 2, and their product is (-1)×(3) = -3. Since 2-(-3)=2+3=5 the sum of the roots of the equation exceeds the product of its roots by 5.
第5题：

单选题
The author expresses disappointment at the end of the first paragraph (lines 9－11) primarily because she ______.
A
had expected to feel differently about entering Paris
B
did not want to carry her luggage to her destination
C
was fired and hungry from the long plane ride
D
had hoped Paris would be less dirty
E
realized she brought too many belongings

正确答案： E
解析：
作者提到她的感受“This was not the climactic moment I had anticipated”，故选A项最合适。
第6题：

单选题
What is the least possible value of (x+1)2 if -2≤x≤3?
A
-2
B
3
C
-1
D
0
E
1

正确答案： E
解析：
Since (x+1)² is the square of a number, the least possible square of a real number must be 0.
第7题：

单选题
Many people are stunned at how the personalities of twins can be, even of those who look ______.
A
interchangeable, identical
B
perplexing, secretive
C
contradictory, unrelated
D
veracious, handsome
E
dissimilar, alike

正确答案： B
解析：
“even”表明句子的意思之间形成对比，所以两个空的意思应相反，所以可排除A，B和C项。因为D项的两个单词不相关，所以应选E项。
第8题：

单选题
If n/6, n/8 and n/9 are all integers, then n must be divisible by ______.
A
54
B
64
C
65
D
68
E
72

正确答案： B
解析：
因为n/6, n/8和n/9都是整数，那么n一定是6,8,9的倍数。这三个数的最小公倍数为72。n 可以是比72大的整数，但是n一定是72的倍数，如144,216。
第9题：

单选题
Which of the following best characterizes the individual perspectives presented in the two passages?
A
The first suggests that we should put for faith in our intuition, while the second cautions us against irrational thinking.
B
The first examines the nature and origins of intuition from a scientific perspective, while the second analyzes dubious notions in sports.
C
The first is concerned with debunking a theory about intuition, while the second advocates intuitive thinking for improving sports performance.
D
The first provides an objective account of research on human intuition, while the second presents a first-person account of intuition at work.
E
The first focuses on the fallible nature of moral intuition, while the second argues that intuitive thinking is more reliable than many people think.

正确答案： A
解析：
第一篇文章主要是关于非理性力量的科学研究，这项研究不那么乐观，更加谨慎地阐释了非理性的力量（10-11行）。第二段主要是讲运动的直觉，尤其讲到比赛的结果更取决于比赛最后的一刻这个可疑的概念。
第10题：

单选题
If (2y+ k) 2 =4y2-12y+ k2, what is the value of k?
A
3
B
1
C
-1
D
-2
E
-3

正确答案： D
解析：
You are told that (2y + k)² = 4y² - 12y + k². Use the formula for expanding the square of a binomial:
(2y + k)² = (2y)² + 2(2yk) + k²= 4y² + 4yk + k². Compare 4y² - 12y + k² with 4y² + 4yk + k². Since the two trinomials must be the same, then -12y = 4yk, so k =-12y/4y =-3
第11题：

单选题
The actor has a ______ personality: outgoing on stage but shy in social settings, he is scarcely the same person.
A
consummate
B
gregarious
C
varied
D
haughty
E
suspicious

正确答案： C
解析：
这个演员在舞台上十分外向，但在社会场合上却很害羞。可以看出他的性格是多样的，变化的。varied“多变的；各式各样的”。
第12题：

单选题
Two teenagers can paint a garage in 6 hours. How many hours would it take 3 teenagers to paint the same garage?
A
3/2
B
5/2
C
8/3
D
3
E
4

正确答案： A
解析：
Let x represent the time three teenagers take to paint a garage, then. 3x=2×6. x=12/3, x=4.
第13题：

单选题
The requirements for raising a child according to a well-known psychologist is discipline rather than uncontrolled anger and executive punishment.
A
The requirements for raising a child according to a well-known psychologist is
B
To raise a child, according to a well-known psychologist, it requires
C
According to a well-known psychologist, raising a child requires
D
In raising a child is required, according to a well-known psychologist
E
As for raising a child according to a well-known psychologist

正确答案： A
解析：
A项主谓不一致。B项代词指代模糊。D和E项不恰当。C项简洁且表意清晰。
第14题：

单选题
(1 + sinθ)(1 - sinθ) = ______.
A
1 - sinθ
B
cos²θ
C
1-2sinθ+sin²θ
D
cosθ

正确答案： B
解析：
Recall that sin²θ+ cos²θ = 1, so cos²θ = 1 - sin²θ. (1 + sinθ)(1 - sinθ)= 1 - sin²θ= cos²θ.
第15题：

单选题
Which of the following, if true, would most undermine the arguments of the Italian historians (line 59) in the final paragraph?
A
Residents of Siena identify with their neighborhoods, not with the city as a whole.
B
Contemporary Italians feel little sympathy for colonial exploits.
C
The designer of the imperial crest most admired giraffes for their size and gentleness.
D
Horse－racing requires speed but little endurance.
E
The imperial crest was commissioned by a nobleman whose private menagerie included a leopard and two camels.

正确答案： D
解析：
文中最后一段最后一句提到历史学家认为“the imperiale designation is owing to the qualities prescribed to the giraffe”长颈鹿拥有豹子的速度和优雅以及骆驼的耐力，C选项内容与专家观点不同，故选C。
第16题：

单选题
Popular magazines are not appropriate in school libraries, because it is not benefiting students educationally.
A
it is not benefiting students
B
it does not benefit students
C
they are not benefiting students
D
they do not benefit students
E
they are not providing students benefits

正确答案： C
解析：
主语通俗杂志为复数，因此句子后半部分代词应为they,而不是its。C中的短语are not benefiting 不是固定用法且时态不正确。因为这句话表达的是通俗杂志的总体特征，因此用一般现在式。
第17题：

单选题
For Rachel, tea at the Hamilton estate (line 25) represents ______.
A
an awkward encounter
B
a surprising opportunity
C
an onerous duty
D
a dangerous development
E
a long-desired invitation

正确答案： A
解析：
文中提到对于收到的邀请，“it stunned Rachel a little”，所以Rachel是惊讶的。
第18题：

单选题
Some experts ______ that driving while talking on a cell phone is dangerous and ______ because it prevents drivers from devoting their full attention to the road.
A
rescind, foolhardy
B
deny, perilous
C
contend, harmless
D
contest, inconvenient
E
assert, distracting

正确答案： E
解析：
一些专家认为在开车的时候打电话是很危险的，因为开车的时候打电话使人们不能专心开车。可以看出开车的时候打电话能使人们分心。故选E。distracting“分心的；分散注意力的”；foolhardy“有勇无谋的；蛮干的”；rescind“解除；废除；撤回”。
第19题：

单选题
All of Mark's former students go to college. If the statement above is true, which of the following must also be true?
A
If Ethan was not Mark's student, then he& is not going to college.
B
If Joyelle goes to college, then she was& not Mark's student.
C
If Ginger goes to college, then she was& Mark's student.
D
If Stephanie was Mark's student, then& she is not going to college.
E
If Steve does not go to college, then he& was not Mark's student.

正确答案： D
解析：
如果题目给出的陈述正确，那么E也正确，Steve不可能是Mark的学生，因为马克的学生都上大学。A是错误的，因为Ethan不是Mark的学生并不能说明Ethan没有上大学。B也是错误的，因为如果Ginger上大学，那么他就是Mark的学生不成立，因为陈述上讲的是Mark的学生都上了大学，而不是只要上大学就是Mark的学生。C错误，因为C认为所有上大学的人都是Mark的学生。D认为如果Steve没有上大学，那么他就不是Mark的学生，与题干给出的陈述相反，不正确。
第20题：

单选题
If a and b are integers and the sum of ab and b is even, which of the following could be true?Ⅰ. a and b are both odd.Ⅱ. a is even and b is odd.Ⅲ. a is odd and b is even.
A
Ⅰ only
B
Ⅱonly
C
Ⅲ only
D
Ⅰ and Ⅱ
E
Ⅰand Ⅲ

正确答案： B
解析：
Plug-in. StatementⅠ：if a and b are both odd, says a=1 and b=3, then ab+b=6. Since the sum is even, statementⅠ is true. StatementⅡ：1et a=2 and b=3, then ab+b=9. Since the sum is odd, this statement is false. Statement Ⅲ：let a=3 and b=2, then ab+b=8, which is even. So both statement Ⅰand statementⅢ are true.
第21题：

单选题
The plot of the movie was neither plausible and it was not even faithful to the novel.
A
and it was not even faithful to the novel
B
nor was it faithful to the novel
C
nor faithful to the novel
D
and certainly not faithful to the novel
E
yet hardly faithful to the novel

正确答案： D
解析：
neither...nor为固定搭配。
第22题：

单选题
The French Club consists of 10 members and is holding officer elections to select a president, secretary, and treasurer for the club. A member can only be selected for one position. How many possibilities are there for selecting the three officers?
A
30
B
27
C
72
D
720
E
90

正确答案： A
解析：
There are 10 possible people that could serve as president. Once the president is chosen, there are 9 possible people that could serve as secretary, and once that person is chosen, there are 8 remaining people that could serve as treasurer. The total number of ways of selecting the three officers is 10×9 × 8=720.
第23题：

单选题
Two circles, P and Q, lie in the same plane. If the center of circle Q lies on circle P, then in how many points could circle P and circle Q intersect?Ⅰ. 0Ⅱ. 1Ⅲ. 2
A
Ⅰ only
B
Ⅱ only
C
Ⅲ only
D
Ⅰ, Ⅱ and Ⅲ
E
Ⅱ and Ⅲ only

正确答案： C
解析：
If the radius of circle Q is greater than the diameter of circle P, there is no intersection point. If the radius of circle Q is equal to the diameter of circle P, there is one intersection point. If the radius of circle Q is less than the diameter of circle P, there are two intersection points.
第24题：

填空题
k is an integer between 50 and 90 and is a multiple of 4. When k is divided by 5, the remainder is 3. When k is divided by 3, the remainder is 2. What is the value of k?____

正确答案： 68
解析：
因为50和90之间的是4的倍数的数为52, 56, 60, 64, 68, 72, 76, 80, 84, 88。被5除余3的数为68和88。被3除余2的数为68。

单选题The reference to pieces of debris in Passage 1 (line 3) is used to ______.A highlight the potential uses of stone implementB contrast this early innovation with those of later generationsC suggest that these devices are man's greatest achievementD emph

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