问答题A car traveled from A to B in 30 minutes. The first half of the trip was covered at 50 mph, and the second half at 60 mph. What was the average speed?400/11 - 500/11 - 600/11 - 700/11
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更多“A car traveled from A to B in 30 minutes. The first half of”相关问题
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第1题：
It was ( )ride from the school to the downtown.A、an half hour’s
B、half an hour
C、half an hour’s
D、half a hour’s
参考答案：C
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第2题：
The boy fixed his eyes()the toy car for a few minutes.A、in
B、on
C、into
D、over
参考答案：B
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第3题：
b)
main()
{
union{ /*定义一个联合*/
int i;
struct{ /*在联合中定义一个结构*/
char first;
char second;
}half;
}number;
number.i=0x4241; /*联合成员赋值*/
printf("%c%c\n", number.half.first,
mumber.half.second);
number.half.first='a'; /*联合中结构成员赋值
*/
number.half.second='b';
printf("%x\n", number.i);
getch();
}
正确答案：AB (0x41 对应'A',是低位；Ox42 对应'B',
是高位）6261 (number.i 和number.half 共用一块地址空
间） -
第4题：
The vision of that big black car hitting the sidewalk a few feet from us will never be（）from my memory．
A.ejected
B.escaped
C.erased
D.omitted答案：C解析： -
第5题：
Brighton is a popular seaside town on the south coast of England.Not long ago,some policemen were very?21.There had been several,serious accidents?22?by motorists driving too fast.The police started to set up a speed trap（速度监视器）.They measured?23?of 88 yards on a straight road and watched to see?24?a car took to?25?that far.They knew that if a car took six seconds,it was traveling faster?26?the?27?limit of 30 miles an hour.
When the policemen were ready,they hid?28?a hedge（树篱）and started to time passing cars.During their first half an hour,they caught five drivers.The policemen wrote down the?29?of each car and the name and address of the driver.But for the next half an hour the policemen didn′t see anybody?30?too fast.They thought that this was very?31.One of them drove a quarter of a mile along the road and saw two students?32?on the grass.They were holding up a sheet of cupboard so that motorists could see it.On the notice one of the students?33:"Danger.Speed trap."
The policemen took the notice away and wrote down the names of the students.Later on they were each fined￡5 for?34?to stop the police catching motorists who were?35?the law.
第30题答案是A.running
B.walking
C.driving
D.climbing答案：C解析：考情点拨:词义辨析题。
应试指导:此处意为：警察没看到任何人超速驾驶。run跑；walk步行；climb爬，均不符合题意。 -
第6题：
The car accident happened at（）crossroads a few metres away from（）bank.
- A、the; /
- B、/; a
- C、/; the
- D、the; the
正确答案:D -
第7题：
单选题To wait in the queue for half an hour, the old man suddenly realized that he had left the wallet in the car.ATo wait
Bfor
Crealized
Dhad left
正确答案： D解析： -
第8题：
单选题______in the queue for half an hour, the old man suddenly realised he had left the cheque in the car.AWaiting
BTo wait
CHaving waited
DTo have waited
正确答案： B解析：
句意：这个老人排队等了半个小时后，突然意识到他把支票留在车上了。根据句意可知，wait发生在realise之前，而且动作已经发生，因此要用完成时的现在分词形式。故答案是C项。 -
第9题：
问答题Between the 32 NFL teams in 2005, the Indianapolis Colts scored the most first half points and allowed the fewest A B C Dsecond half points. No error E正确答案： A解析：
因为Colts是美国美国橄榄球联盟32个队伍中的一支，因此between应改为among。 -
第10题：
判断题Both France and Germany performed satisfactorily in the first half of the year.A对
B错
正确答案： 对解析：
从录音中提到的“…both French consumers and German exporters, the euro area’s twin-stroke engine of growth in the first half of the year…”，可知法国和德国在上半年的表现令人满意。
【录音原文】
Anxious observers will have to wait until later in the month to confirm which parts of the euro area’s giant economy are losing the most steam. But it is likely that both French consumers and German exporters, the euro area’s twin-stroke engine of growth in the first half of the year, have misfired since. -
第11题：
单选题What can we get from the passage?ADave skated a total of 4,830 kilometers across Australia
BDave spent 5 months skating from Perth to Brisbane
CDave was the first person to skateboard across the US
DDave traveled at the speed of 600 kilometers a week
正确答案： B解析：
由第一段中的“Dave’s journey started in Perth and ended in Brisbane, traveling about 60 kilometers a day. It took him five months and l3 pairs of shoes”可知，B项正确，意思是“Dave从Perth滑到Brisbane用了五个月时间”。 -
第12题：
单选题The main idea of the first paragraph is that the car _____.Acan satisfy the demand for speed
Bcauses waste of space
Cproduces disturbance to other road users
Dis far from perfect for short range movements
正确答案： C解析：
本题的依据句是第一段的最后一句话“The use of cars capable of carrying five people at 80 mph for satisfying these needs is wasteful of space and most productive of disturbance to other road users.”。从中可知，A、B、C三项都不能完整地表达第一段的中心思想，只有D项涵盖了前三项的意思，因此是正确答案。 -
第13题：
the “american system“ of mass production was first used in ________________.
A. agriculture
B. textile industry
C. firearms industry
D. car industry
参考答案：C
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第14题：
It’s only ________ walk from here to the cinema.A.half an hours
B.half a hour’s
C.half an hour’s
D.half a hours’
参考答案：C
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第15题：
When discharging an oil cargo，the first consideration is to ______．
A.get the bow up
B.discharge from the wings first
C.discharge from the centerline tanks first
D.discharge from amidships first
正确答案：A
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第16题：
Brighton is a popular seaside town on the south coast of England.Not long ago,some policemen were very?21.There had been several,serious accidents?22?by motorists driving too fast.The police started to set up a speed trap（速度监视器）.They measured?23?of 88 yards on a straight road and watched to see?24?a car took to?25?that far.They knew that if a car took six seconds,it was traveling faster?26?the?27?limit of 30 miles an hour.
When the policemen were ready,they hid?28?a hedge（树篱）and started to time passing cars.During their first half an hour,they caught five drivers.The policemen wrote down the?29?of each car and the name and address of the driver.But for the next half an hour the policemen didn′t see anybody?30?too fast.They thought that this was very?31.One of them drove a quarter of a mile along the road and saw two students?32?on the grass.They were holding up a sheet of cupboard so that motorists could see it.On the notice one of the students?33:"Danger.Speed trap."
The policemen took the notice away and wrote down the names of the students.Later on they were each fined￡5 for?34?to stop the police catching motorists who were?35?the law.
第29题答案是A.sign
B.signal
C.number
D.shape答案：C解析：考情点拨:词义辨析题。
应试指导:此处意为：警察写下每辆车的车牌号和司机的姓名、地址。number号码；sign迹象；signal信号；shape形状。 -
第17题：
The car accident happened at（）crossroads a few metres away from（）bank.
Athe; /
B/; a
C/; the
Dthe; the
D
略 -
第18题：
单选题ABy the end of this century.
BBy the first half of this century.
CBy the second half of this century.
DIn the middle of this century.
正确答案： C解析：
[考点]细节题。录音提到，大多数科学家认为最大化的警告将会在本世纪后50年产生。
【听力原文】
With the development of science, scientists have discovered more about the world. Scientists say world coastal areas must prepare now for [33] a rise in sea levels. No matter what action is taken, scientists say there are already enough [34] greenhouse gases in the atmosphere to cause a major warning. As a result, scientists and government officials are focusing on how society might adapt to rising sea levels, changing agricultural zones, changing climates and other problems.
Already, state and local governments along the coast of the United States are starting to plan for a possible long-term rise in the sea level, and a few have taken action to cope with it. Agricultural researchers are developing [35] heat-resistant and draught-resistant crops that might replace traditional crops if the climate changes. How long it will take for maximum warming to be reached is uncertain because the oceans slow such warming. Most scientists expect the maximum warming to take place [36] by the second half of this century.
If levels of greenhouse gases in the atmosphere double, sea levels will rise; estimates of the average rise are from 1.5 feet to 6.5 feet. Some leading experts expect a rise of 1 meter, a little more than three feet.
Questions 33 to36 are based on the passage you have just heard.
33. What must world coastal areas prepare for according to scientists’ opinion?
34. According to the passage, what has caused the rise in sea levels?
35. What are the agricultural researchers developing?
36. When will the maximum warming take place? -
第19题：
单选题When discharging an oil cargo，the first consideration is to（）.Aget the bow up
Bdischarge from the wings first
Cdischarge from the centerline tanks first
Ddischarge from amidships first
正确答案： C解析： 暂无解析 -
第20题：
单选题The purpose of this passage is to tell people that_____.Amost old people die from accidents at home
Bup to half of home accidents could be prevented
Cfalls at home can be avoided by taking some simple measures
Dprotection of old people should be the first concern for the public
正确答案： A解析：
从文章的意思来看，作者主要介绍了三种避免老人在家中摔倒的方法，可见文章主要是围绕避免摔倒的问题展开的。因此正确答案为C。 -
第21题：
单选题When is a stand-on vessel FIRST allowed by the Rules to take action in order to avoid collision?（）AWhen the two vessels are less than half a mile from each other
BWhen the give-way vessel is not taking appropriate action to avoid collision
CWhen collision is imminent
DThe stand-on vessel is never allowed to take action
正确答案： B解析： 暂无解析 -
第22题：
单选题What is the principal danger from the liquid in a half full tank onboard a vessel?（）ACorrosion from the shifting liquid
BRupturing of bulkheads from the shifting liquid
CLoss of stability from free surface effect
DHoling of the tank bottom from the weight of the shifting liquid
正确答案： B解析： 暂无解析 -
第23题：
单选题57. A At first sight B At the beginning C In the first view D From the firstAA
BB
CC
DD
正确答案： B解析：