问题 单项选择题

起动机的电磁开关工作时,是()

A.先接通主电路,然后使驱动齿轮与飞轮啮合

B.先使驱动齿轮与飞轮啮合,然后接通主电路

C.接通主电路和驱动齿轮与飞轮啮合同时进行

D.没有先后的要求

答案

参考答案:C

阅读理解

 School education(教育) is very important and useful. Yet, no one can learn everything from school. A teacher, no matter how much he knows, can not teach his students everything they want to know. The teacher’s job is to show his students how to learn. He teaches them how to read and how to think. So, much more is to be learned outside school by the students themselves.

It is always more important to know how to study by oneself than to memorize some facts or a formula(公式). It is actually quite easy to learn a certain fact in history or a formula in math. But it is very difficult to use a formula in working out a math problem.

Great scientists didn’t get everything from school. For example, Edison didn’t even finish primary school. But they were all so successful. They invented so many things . The reason for their success was that they knew how to study. They read books that were not taught at school. They would ask many questions as they read. They did thousands of experiments. They worked hard all their lives, wasting not a single moment. Above all, they knew how to use their brain.

小题1:  According to the passage, the most important thing a teacher should do is _______.

A.to teach his students everything he knows

B.to teach the students how to think

C.to know everything they want to know

D.to teach the students how to work out a math problem小题2: To work out a math problem, you need to know _________.

A.a certain formula

B.a certain fact

C.some facts

D.the way to solve it小题3: Which of the following is NOT true?

A.Great scientists read a lot of books and asked many questions while reading.

B.Great scientists did thousands of experiments.

C.Great scientists always worked hard and never wasted time.

D.Great scientists got everything from school.小题4: The passage is written mainly to tell us         .

A.how to memorize some facts or a formula(公式)

B.who the great scientists are

C.How to study

D.why Edison didn’t finish primary school

多项选择题