2016年6月大学英语六级考试模拟题及答案(六)

　　34. The chief consideration for using liquid fuels in human—piloted space flights is that the rocket .

　　A. is inexpensive to construct B. is capable of carrying heavy cargo

　　C. is easy to control D. is inexpensive to operate

　　35. Which of the following statements is true about solid—fuel rockets?

　　A. They are simple to construct.

　　B. They can be re—ignited when desired.

　　C. They can provide fine adjustments in operation.

　　D. They cost a lot less than liquid—fuel rockets to construct.

　　Questions 36 to 40 are based on the following passage:

　　For some time past it has been widely accepted that babies—and other creatures—learn to do things because certain acts lead to rewards; and there is no reason to doubt that this is true. But it used also to be widely believed that effective rewards, at least in the early stages, had to be directly related to such basic physiological drives as thirst or hunger. In other words, a baby would learn if he got food or drink or some sort of physical comfort, not otherwise.

　　It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.

　　Papousek began his studies by using milk in the normal way to reward the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response in situations where no milk was provided. He quickly found that children as young as four months would learn to turn their heads to right or left if the movement switched on a display of lights— and indeed that they were capable of learning quite complex turns to bring about this result, for instance, two left or two right, or even to make as many as three turns to one side.

　　Papousek's light display was placed directly in front of the babies and he made the interesting observation that sometimes they would not turn back to watch the lights closely although they would smile and bubble when the display came on. Papousek concluded that it was not primarily the sight of the lights which pleased them, it was the success they were achieving in solving the problem, in mastering the skill, and that there exists a fundamental human urge to make sense of the world and bring it under intentional control.

　　36. In this article, the author suggests that babies learn to do things when

　　A. such acts lead to desired rewards

　　B. they enjoy a sense of achievement

　　C. their curiosity is satisfied

　　D. they can derive fun from such acts

　　37. In his experiment, Papousek noticed that a baby

　　A. would go on making the learned response with no milk provided

　　B. would have to have enough to drink before the experiment began

　　C. would not make the learned response until milk is provided

　　D. would make the learned response with pleasure only when it saw the light display

　　38. According to the passage, the babies would smile and bubble when the light display was turned on primarily because

　　A. the babies were impressed by the beautiful sight

　　B. the lights are related to babies' physical drives

　　C. the babies felt they succeeded in switching on the lights

　　D. the babies were happy that they learned how to respond to this sight

　　39. According to Papousek, the pleasure the babies displayed when they saw the light display was a reflection of

　　A. the satisfaction of their curiosity

　　B. the satisfaction of their physiological needs

　　C. the basic human urge to understand and control the world

　　D. the babies' desire to solve complex problems