12.远距离输电时.输电线的电阻为R.输送的电功率为P.为了使输电线上的热损耗不超过其输送功率的4%.输电电压应为 A.5 B.4 C.3 D.2 第Ⅱ卷 查看更多

 

题目列表(包括答案和解析)

Thirteen vehicles lined up last March to race across the Mojave Desert, seeking a million in prize money. To win, they had to finish the 142-mile race in less than 10 hours. Teams and watchers knew there might be no winner at all, because these vehicles were missing a key part -drivers.

DARPA, the Defense Advanced Research Projects Agency, organized the race as part of a push to develop robotic vehicles for future battlefields. But the Grand Challenge, as it was called, just proved how difficult it is to get a car to speed across an unfamiliar desert without human guidance. One had its brake lock up in the starting area. Another began by throwing itself onto a wall. Another got tied up by bushes near the road after 1.9 miles.

One turned upside down. One took off in entirely the wrong direction and had to be disabled by remote (远距离的) control. One went a little more than a mile and rushed into a fence; another managed to go for six miles but stuck on a rock. The “winner,” if there was any, reached 7.8 miles before it ran into a long, narrow hole, and the front wheels caught on fire.

“You get a lot of respect for natural abilities of the living things,” says Reinhold Behringer, who helped design two of the car-size vehicles for a company called Sci-Autonics. “Even ants (蚂蚁) can do all these tasks effortlessly . It’s very hard for us to put these abilities into our machines.”

The robotic vehicles, though with necessary modern equipment such as advanced computers and GPS guidance, had trouble figuring out fast enough the blocks ahead that a two-year-old human recognizes immediately, Sure, that very young child, who has just only learned to walk, may not think to wipe apple juice off her face, but she already knows that when there’s a cookie in the kitchen she has to climb up the table, and that when she gets to the cookie it will taste good. She is more advanced, even months old, than any machine humans have designed.

Watchers doubted if any of the vehicles could finish the race because        .

A.they did not have any human guidance

B.the road was not familiar to the drivers

C.the distance was too long for the vehicles

D.the prize money was unattractive to the drivers

DARPA organized the race in order to         .

A.raise money for producing more robotic vehicles

B.push the development of vehicle industry

C.train more people to drive in the desert

D.improve the vehicles for future wars

From the passage we know “robotic vehicles” are a kind of machines that         .

A.can do effortlessly whatever tasks living thing can

B.can take part in a race across 142 miles with a time limit

C.can show off their ability to turn themselves upside down

D.can move from place to place without being driven by human beings

In the race, the greatest distance one robotic vehicle covered was          .

A.about eight miles    B.six miles

C.almost two miles     D.about one mile

In the last paragraph, the writer implies that there is a long way to go         .

A.for a robotic vehicle to finish a 142-mile race without any difficulties

B.for a little child who has just learned to walk to reach the cookie on the table

C.for a robotic vehicle to deal with a simple problem that a little child can solve

D.for a little child to understand the importance of wiping apple juice off its face

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第四部分:写作(共三节,满分25分)

第一节完成句子(共10小题;每小题0.5分,满分5分)

1. 在火山喷发的第二天,我有幸做了一次远距离观看

The day after the eruption I was  81__   82    83 have a much closer look at it

2.当我意识到那珍贵的项链不见了,我十分惊慌。

When I realized the precious neclace had gone, I  84 .

3.他的方案顺利通过了,大多数与会代表都赞同他的方案。

His programme has been passed smoothly because most of the representatives in the conference 85     86  it.

4.我忘了让您去社区服务中心了。

I forgot to ask you to go to the  87    88 center.

5.被枪击中并从阳台坠落后他一直处于昏迷状态。

He was  89 after being __90_ and falling off the balcony.

 

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Thirteen vehicles lined up last March to race across the Mojave Desert , seeking a million in prize money . To win , they had to finish the 142-mile race in less than 10 hours . Teams and watchers knew there might be no winner at all , because these vehicles were missinge a key part drivers .

DARPA , the Defense Advanced Research Projects Agency , organized the race as part of a push to develop robotic vehicles for future battlefields . But the Grand Challenge , as it was called , just proved how difficult it is to get a car to speed across an unfamiliar desert without human guidance . One had its brake lock up in the starting area . Another began by throwing itself onto a wall . Another got tied up by bushes near the road after 1.9 miles .

One turned upside down . One took off in entirely the wrong direction and had to be disabled by remote (远距离的) control . One went a little more than a mile and rushed into a fence ; another managed to go for six miles but stuck on a rock . The “winner,” if there was any , reached 7.8 miles before it ran into a long , narrow hole , and the front wheels caught on fire .

“You get a lot of respect for natural abilities of the living things,” says Reinhold Behringer , who helped design two of the car-size vehicles for a company called Sci-Autonics . “Even ants (蚂蚁) can do all these tasks effortlessly . It’s very hard for us to put these abilities into our machines .”

The robotic vehicles , though with necessary modern equipment such as advanced computers and GPS guidance , had trouble figuring out fast enough the blocks ahead that a two-year-old human recognizes immediately , Sure , that very young child, who has just only learned to walk , may not think to wipe apple juice off her face , but she already knows that when there’s a cookie in the kitchen she has to climb up the table , and that when she gets to the cookie it will taste good . She is more advanced , even months old , than any machine humans have designed .

67.Watchers doubted if any of the vehicles could finish the race because        .

       A.they did not have any human guidance

       B.the road was not familiar to the drivers

       C.the distance was too long for the vehicles

       D.the prize money was unattractive to the drivers

68.DARPA organized the race in order to          .

       A.raise money for producing more robotic vehicles

       B.push the development of vehicle industry

       C.train more people to drive in the desert

       D.improve the vehicles for future wars

69.From the passage we know “robotic vehicles” are a kind of machines that          .

       A.can do effortlessly whatever tasks living thing can

       B.can take part in a race across 142 miles with a time limit

       C.can show off their ability to turn themselves upside down

       D.can move from place to place without being driven by human beings

70.In the race , the greatest distance one robotic vehicle covered was          .

       A.about eight miles                                 B.six miles

       C.almost two miles                                 D.about one mile

71.In the last paragraph , the writer implies that there is a long way to go          .

       A.for a robotic vehicle to finish a 142-mile race without any difficulties

       B.for a little child who has just learned to walk to reach the cookie on the table

       C.for a robotic vehicle to deal with a simple problem that a little child can solve

       D.for a little child to understand the importance of wiping apple juice off its face

 

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第三节:书面表达(满分30分)

以”How to Protect Eyesight”为题,写一篇短文,说明保护视力的重要性和主要措施.(100字左右)主要措施是:

用眼时间不能过长.

阅读时,眼睛与书应该保持一英尺左右的距离

不能在昏暗的光线或强烈的阳光下看书,也不要在车上、床上看书.

坚持每日做眼保健操.

参考词:dim light 昏暗的灯光  eye exercises 眼保健操

How to Protect Your Eyesight

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 某英文报社正在以”Our Life in the Future”为题征文,请你用英语写一篇80—100词的短文,内容包括你对未来人们在学习、工作、生活、环境、旅游、健康等方面的设想。短文内容可以涉及足不出户就可以在网上学习、读书看报、购物,通过电能汽车以及太阳能、风能的使用保护环境;太空旅游以及网上看病、远距离手术等等方面。第一句已给出,不计入词数内

Our Life in the Future

  With the rapid development of hi--tech,our life will change a lot in many ways' in the future.

 

 

 

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