问题 单项选择题

在电动型主机遥控系统的起动逻辑回路中,其正确说法是()。

①停车后的第一次起动为时间起动;

②第二次起动为重起动;

③时间起动是按纯时序原则安排;

④非时间起动是按转速-时序原则安排起动;

⑤正常起动失败后,间隔时间由计时电路实现;

⑥第三次起动为重起动。

A.①③④⑤

B.②④⑤⑥

C.③④⑤⑥

D.①②④⑥

答案

参考答案:A

阅读理解

阅读理解。

     A passenger was looking everywhere for his ticket because the conductor was coming up to punch tickets. He searched the pockets of his trousers, his coat and his wallet. To the other passengers' surprise, they saw

that he had the ticket in his mouth. The conductor quickly pulled the ticked out of his mouth, punched it, and

gave it back to him. When the conductor moved on, the passenger's friend said, "I'm sure you felt foolish just

now, sitting there looking everywhere for your tickets when it was right in your mouth all the time."

    "Foolish?" answered the passenger. "I was chewing the date off."

    When his friend heard this, he criticized him and asked him to buy a ticket.

1. The passenger ________.

A. lost his tickets

B. didn't buy a ticket for the trip

C. was looking for a lost ticked

D. forgot when he had put his ticket

2. The other passengers wanted to laugh because ________.

A. the passenger lost his ticket

B. the passenger was chewing his ticket

C. the passenger had no ticket

D. they saw that the passenger had the ticket in his mouth

3. His friend ________.

A. knew why he was looking for the ticket

B. didn't know why he was looking for his ticket

C. didn't know he had lost his ticket

D. didn't know that he didn't have the money for a ticket

4. The conductor ________.

A. thought the man was not honest

B. knew why the man was chewing the ticket

C. thought the man had forgotten that the ticket was in his mouth

D. knew why the man had put the ticket into his mouth

5. The ticket in his mouth ________.

A. was someone else's

B. was the right one for the trip

C. was an old ticket that shouldn't be used again

D. was the one he bought on the train

问答题 简答题