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问题 单项选择题

由于肥胖会给个人形象带来负面影响，如果肥胖者有意识的在饮食方面加以控制，可以由此减轻体重避免了肥胖影响自己的形象，最终使控制饮食的行为得到强化，指的是（）

A.正强化

B.负强化

C.惩罚

D.消退

答案

参考答案：B

听力题

Not many years ago， a wealthy and rather strange old man named Johnson lived a__1___ in a village in the south of England. He had m___2___a lot of money in trading with foreign countries. When he was seventy-five， he gave ￡ 12，000 to the village s____3___ to buy land and equipment for a children’s playground。

As a result of his kindness， many people came to visit him. A__4_____them was a newspaperman. During their talk， Johnson remarked that he was seventy-five and expected to live to be a h___5___. The newspaperman asked him how he managed to be healthy at seventy—five. Johnson had a sense of h__6___.  He liked whisky and drank some each day. “I have an injection （注射） in my neck e___7__ evening.”he told the newspaperman， thinking of his evening glass of whisky.

The newspaperman did not understand what Johnson m__8___. In his newspaper he r____9___that Johnson was seventy-five and had a daily injection in his neck. Within a week Johnson received thousands of letters from all over Britain， asking him for the s__10___ of his daily injection.
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单项选择题

目前，制造计算机所用的电子元器件是( )。

A．大规模集成电路

B．晶体管

C．集成电路

D．电子管
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