问题 单项选择题 A型题

药效受大量摄入叶酸影响的药物是()

A.左旋多巴

B.苯巴比妥

C.硝苯地平

D.氢化可的松

E.普萘洛尔

答案

参考答案:B

解析:叶酸和抗惊厥药在肠细胞表面,也可能在大脑细胞表面相互拮抗,大剂量叶酸可促使已用抗惊厥药控制了癫痫症状的病人发生抽搐。

阅读理解

  What comes into your mind when you think about robots? Do you imagine armies of evil metal monsters planning to take over the world? Or, perhaps of mechanical men who have been created as guards or soldiers by a mad genius? Or maybe you think of man- like robots who act, think, and look like human beings. In fact robots like these have more to do with science fiction films than with real life. In the real world robots are machines that do jobs which otherwise have to be done by people. Robots either operate by themselves or under the control of a person.

  In a car factory, for example, robot machinery can put together and paint car bodies. On the sea bed remotecontrolled(遥控)underwater machines with mechanical arms can perform tasks too difficult for divers. Robot spacecraft can explore the solar system and send back information about planets and stars.

  Many robots have computer brains. Some robots are fitted with cameras , sensors, and microphones which enable them to see, to feel, and to hear. And some robots can even produce electronic speech.

  All this does not mean that a robot can think and behave like a human being. Present day robots have to be programmed with a good deal of information before they can carry out even simple tasks.

 44.Robots in real life________.

  A. can behave like human beings   B. have the ability to control the world

  C. can think by themselves        D. can help us with a lot of work

 45.According to this article, which of the following is not true about robots in the real world?

  A. Some robots are as creative as artists.     B. Some robots can help manufacture cars.

  C. Some robots can see and hear.       D. Some robots can explore outer space.

 46.Robots can perform many tasks for man because________.

  A. they have intelligence    B. they are supplied with computer programs

  C. they can imitate human beings    D. they have the ability to learn new things

 47.The robots in science fiction films and those in real life differ mainly in________.

  A. mentality   B. appearance   C. material    D. size

单项选择题