普通螺纹的牙型角是。

题型:判断题

问题:

普通螺纹的牙型角是。

考点:初级钳工初级钳工题库
题型:判断题

阅读理解。

  "How are you?" is a nice question. It's a friendly way that people in the

U.S.A greet each other. But "How are you?" is also a very unusual question. It's a

question that often doesn't need an answer. The person who asks "How are you?"

hopes to hear the answer"Fine", even if the person's friend isn't fine.The reason

is that "How are you?" isn't really a question and "Fine"isn't really an answer.

They are simply other ways of saying"Hello"or "Hi".

  Sometimes, people also don't say exactly what they mean. For example,

when someone Asks "Do you agree?", the other person might think, "No, I

disagree. I think you're Wrong..."But it isn't very polite to disagree so strongly,

so the other person might say"I'm not sure." It's a nicer way to say that you don't

agree with someone.

  People also don't say exactly what they are thinking when they finish talking

with other people.For example, many talks over the phone finish when one

person say "I've to go now."Often,the person who wants to hang up gives and

excuse:"Someone's at the door.""Something is burning on the stove."The excuses

might be real,or not. Perhaps the person who wants to hang up simply doesn't

want to talk any more,but it isn't polite to say that. The excuse is more polite,and

it doesn't hurt the other person.

  Whether they are greeting each other, talking about an idea, of finishing a

talk, people don't say exactly that they are thinking. It's an important way that

people try to be nice to each other, and it's part of the game of language.

1. When a person in America asks"How are you?", he or she wants to hear

"        "

A. How are you?

B. Hello

C. I don't know.

D. Fine

2. When a person disagree with someone, it is polite to say"        "

A. You are wrong.I disagree.

B. I'm not sure.

C. I'm sure I disagree.

D. No, I disagree.

3. A polite way to finish talk is to say"       "

A. You have to go now.

B. I want to hang up.

C. I have to go now.

D. I don't want to talk any more.

4. When a person says"I've to go now. Someone's at the door.", the person may

be         .

A. giving an excuse

B. hurting someone's feeling

C. ill

D. asking you a question

5. The rule of the game of language is probably       .

A. "Always say what you mean"  

B. "Don't disagree with people."

C. "Never say exactly what you're thinking."    

D. "Be polite."

题型:判断题

轨距的测量,窄轨铁道轨距在轨顶下()处测量。

题型:判断题

中华人民共和国海员证的颁发对象是()。

A、中国籍船舶上工作的中国海员

B、中国籍船舶上工作的外国海员

C、外国籍船舶上工作的中国海员

D、外国籍船舶上工作的外国海员

题型:判断题

对于制冷剂为R12的冷冻装置的制冷循环,实际制冷剂循环量为430kg/h,电动机功率为3.5kW,则实际的制冷系数为()。

A.3.1

B.4.1

C.3.6

D.4.6

题型:判断题

未配有专职通用操作员的船舶,确保GMDSS设备的可用性方案是().

A、海上维修、岸上维修、双套设备中任选一种

B、岸上维修、双套设备中任选一种

C、只能配备双套设备

D、只能采用岸上维修

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