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n. the time, usu. between the ages of 13 to 19, when a young person is developing into an adult
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发布时间：2022-01-07
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A.cap
B.gate
C.indifference
D.gap
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第2题
The need of the hour is to enhance and _______（large) the scope of cooperation betwe
The need of the hour is to enhance and _______(large) the scope of cooperation between nations.
第3题
The summer holiday is the best part of the year for most children. （31) The weather is usu
The summer holiday is the best part of the year for most children. (31) The weather is usually good, so that one can spend most of one's time playing in the garden or, if one lives in the country, out in the woods and fields. Even if one lives in a big town, one can usually go to a park to play.
The best place for a summer holiday, however, is the seaside. Some children are lucky enough to live near the sea, but for the others who do not, a week or two at one of the big seaside towns is something which they will talk about for the whole of the following year.
In England, it is not only the rich who can take their children to the seaside; if a factory worker or a bus driver, a street cleaner or a waiter wants to take his wife and children to South-end or Margate, Black-pool or Cloak-town, he is usually quite able to do so.
What is it that children like so much about the seaside？ I think it is the sand, sea and sun more than any other things. Of course, there are lots of new things to see, nice things to eat, and exciting things to do, but it is the feeling of sand under one's feet, of salt water on one's skin, and of the warm sun on one's back that make the seaside what it is.
Boys and girls think it best to go to______for a summer holiday.
A．a seaside town
B．a big city
C．the country
D．a town with beautiful parks
第4题
WhyDid one scientist expose birds to artificialDaylight？A.To test the relationship betwe
WhyDid one scientist expose birds to artificialDaylight？
A.To test the relationship betweenDaylight and aDisease of the glands common tobords
B.To test the relationship betweenDaylight and migration．
C.To test the relationship between migration and temperature．
D.To test the relationship betweenDaylight and changes in the season．
第5题
如图所示四显示自动闭塞区段，进站信号机显示USU，空白区段码序，从左往右依次为（）。
A.LU; U; USU
B.LU; U2S; UUS
C.LU; U; UUS
D.LU; U2S; USU
第6题
The passage mainly discusses ______.A．the development of art historyB．the difference betwe
The passage mainly discusses ______.
A．the development of art history
B．the difference between general history and art history
C．what we can learn from art
D．the influence of artists on art history
第7题
An Intelligent CarDriving needs sharp eyes, keen ears, quick brain, and coordination betwe
An Intelligent Car
Driving needs sharp eyes, keen ears, quick brain, and coordination between hands and the brain. Many human drivers have all(51) and can control a fast-moving car. But how does an intelligent car control itself？
There is a virtual driver in the smart car. This virtual driver has "eyes", "brains", "hands" and "feet", too. The minicameras(52)each side of the car are his "eyes", which observe the road conditions ahead of it. They watch the(53) to the car's left and right. There is also a highly(54) driving system in the car. It is the built-in computer, which is the virtual driver's "brain". His "brain" calculates the speeds of(55) moving cars near it and analyzes their positions. Basing on this information, it chooses the right(56) for the intelligent car, and gives(57) to the "hands" and "feet" to act accordingly. In this way, the virtual driver controls his car.
What is the virtual driver's best advantage？ He reacts(58) . The minicameras are(59)images continuously to the "brain." It(60)the processing of the images within 100 milliseconds. However, the world's best driver(61)needs one second to react.(62) , when he takes action, he needs one more second.
The virtual driver is really wonderful. He can reduce the accident(63)considerably on expressways. In this case, can we let him have the wheel at any time and in any place？ Experts(64)that we cannot do that just yet. His ability to recognize things is still(65)He can now only drive an intelligent car on expressways.
A．these
B．them
C．this
D．that
第9题
According to the passage, cutting trees to grow more food______.A．will widen the gap betwe
According to the passage, cutting trees to grow more food______.
A．will widen the gap between the developed and the developing countries
B．is but a short-term relief to the food problem
C．can hardly alleviate the shortage of food
D．proves to be an effective way out for impoverished nations
第10题
The word "civil" in Paragraph 3 refers to wars that are______.A．long-lastingB．fought betwe
The word "civil" in Paragraph 3 refers to wars that are______.
A．long-lasting
B．fought between one part of a country and another
C．short but frequent
D．carried out according to international laws
第11题
______lie（s)between the boundary of Canada and the U. S. and serve（s)as the boundary betwe
______lie(s)between the boundary of Canada and the U. S. and serve(s)as the boundary between the two countries.
A．The Mississippi River
B．The Great Lakes
C．The Rocky Mountains
D．The Grand Canyon
