【单选题】
Thank you for your invitation.___
A. It doesn’t matter.
B. It's a pleasure.
C. It's a small thing.
D. I'll appreciate it.
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答案
B
解析
暂无解析
相关试题
【单选题】
What a beautiful dress you have on today!___
A. It is suitable for me.
B. No, it isn’t.
C. You want to have one, too?
D. Thank you.
【单选题】
I think he is a good lecturer.___
A. Sorry, it doesn’t matter.
B. So do I.
C. Yes. It's a good idea
D. I don't mind
【单选题】
— What's the matter, dear?___
A. I didn't go to school.
B. I have a terrible headache.
C. I took the kids shopping today.
D. It is a beautiful dress.
【单选题】
Good morning, may I speak to Mark, please?___
A. Who's there?
B. Who's that speaking?
C. Who are you?
D. Who wants to speak to Mark?
【单选题】
Let me introduce myself. I'm Steward.___
A. What a pleasure.
B. Pleased to meet you.
C. I don't know.
D. Thanks a lot.
【单选题】
Let's go to the library this afternoon.___.
A. Yes, that's right.
B. No. I can't.
C. What about you?
D. That's a good idea.
【单选题】
What does Tom's wife do for a living?___.
A. She is a doctor.
B. Tom loves his wife.
C. She has a happy life.
D. She lives far from here.
【单选题】
How tall is your sister?___
A. She is not very well.
B. She is 28 years old.
C. She is very nice.
D. She is as tall as I am.
【单选题】
What do you think of this novel?___
A. I've read it.
B. It's well-written.
C. It was written by my uncle.
D. I bought it yesterday.
【单选题】
How much is this necklace?___
A. It's very nice.
B. It's a birthday present from my parents.
C. It costs fifty pounds.
D. It's a bargain.
【单选题】
How can I get to the cinema?___
A. It's very far.
B. Yes, there is a cinema near here.
C. It's well known.
D. Go down this street and turn left.
【单选题】
What's the matter, John?___
A. I failed my French test
B. It doesn't matter.
C. Nothing's wrong with him.
D. I don't think I can.
【单选题】
What are you majoring in?___
A. In a university.
B. Very hard.
C. Mathematics.
D. At nine in the morning.
【单选题】
Are you going on holiday for a long time?___
A. It was a long time.
B. Two weeks ago.
C. No. Only a couple of days.
D. Not long time ago.
【单选题】
Is Mary there?___
A. Speaking.
B. I'm not Mary.
C. Who are you?
D. Mary is well today.
【单选题】
What day is today?___
A. It's March 6.
B. It's a fine day today.
C. It's March.
D. It's Monday.
【单选题】
Is that seat taken?___
A. Please don't worry.
B. I don't think so.
C. Why not?
D. It's very nice.
【单选题】
Thank you for calling.___
A. Don’t mention it.
B. That's fine.
C. Nice talking to you.
D. Call back again.
【单选题】
How are you getting on today?___
A. Very well.
B. How do you do?
C. I'm a doctor.
D. Nice to have known you.
【单选题】
How's your family?___
A. Thanks all the same.
B. Thanks for calling.
C. Not too bad.
D. Don't mention it.
【单选题】
- How is it that you are late for class again?___
A. Because I missed the bus
B. By bus and then on foot
C. Yes, it is quite wrong
D. It is far from school
【单选题】
- Excuse me. Could you spare me a few minutes? - ___
A. Of course.
B. Of course not.
C. I am sorry to hear that.D.Yes. I'm busy now.
【单选题】
- It's very thoughtful of you to give me a ride. ___
A. It's my pleasure.
B. Take it easy.
C. Sure.
D. Never mind.
【单选题】
- This is heavy! What's in it? ___
A. I think you don't like it.
B. My new computer. I just bought it.
C. I'm glad you're here.
D. Are you really interested in it?
【单选题】
___ I'd like to place an order please.
A. Can I help you?
B. I can help you.
C. What are you doing?
D. Why are you doing?
【单选题】
- Do you know the girl over there?___
A. How can I know?
B. Yes, I remember it now.
C. It's Sam, my teacher's daughter.
D. She is a good girl.
【单选题】
- Shall we go out for dinner tonight?____
A. No, you can't.
B. Yes, please.
C. Thank you, I don't want to.
D. Sorry, I have a report to finish.
【单选题】
- I think the reference book(参考书)is very helpful.____
A. Good idea.
B. So do I.
C. With pleasure.
D. No problem.
【单选题】
- I wish you success in your career.____
A. You are welcome.
B. I think so.
C. Yes, please.
D. The same to you.
【单选题】
- Would you like to come over tonight?____
A. Yes, last night.
B. Yes, over there.
C. Sure, I'd love to.
D. Yeah, I liked it too.
【单选题】
- How do I transfer calls? ____
A. Do as you like.
B. It is a bit difficult.
C. Let me show you.
D. Not at all.
【单选题】
- Thanks for inviting me, John, but I've already made other plans. ____. Maybe another time.
A. I hope you enjoy it
B. That's good
C. Oh! I'm sorry to hear that
D. Great! I really had a good time
【单选题】
- Thanks for the lovely party and the delicious food. ____
A. No, thanks.
B. Never mind.
C. Thank you for coming.D.That's all right.
【单选题】
- Why didn't you tell me? ____
A. Sorry, I forgot.
B. I'm sorry you should wait.
C. I don't know.
D. I'd love to.
【单选题】
- What do you plan to do after the exam? ____ How about you?
A. I hate taking exams.
B. I like making plans.
C. Nothing special.
D. I've changed my mind.
【单选题】
- Tom told me that you collect stamps. ____
A. What do you mean?
B. I don't think so.
C. Why did he tell you?
D. Yes, I do. Do you?
【单选题】
- This is a challenging job. Who wants it?____
A. I'll take it.
B. It's a good idea.
C. You bet!
D. No sweat!
【单选题】
- I'm taking my driving test tomorrow. ___!
A. Cheers
B. Good luck
C. Come on
D. Congratulations
【单选题】
- ABC Company, may I help you? ____
A. I am Jack. May I speak to Miss Jenny?
B. This is Jack speaking. May I speak to Miss Jenny?
C. This is Jack speaking. Can I find Miss Jenny?
D. I am Jack. Can I find Miss Jenny?
【单选题】
- You have won the football game. Congratulations! ____
A. We are really lucky.
B. No one else could do it.
C. Oh, not really.
D. It's nice of you to say so.
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133.T68型镗床的主轴电动机采用了近似___的调速方式。
A. 恒转速
B. 通风机型
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【单选题】
134.T68型镗床的主轴电动机M1采用了___的停车方法。
A. 能耗制动
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C. 电磁抱闸制动D.机械摩擦制动
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135.T68型镗床的主电路、控制电路和照明电路由___实现短路保护。
A. 速度继电器
B. 中间继电器
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【单选题】
136.T68型镗床的主轴电动机由___实现过载保护。
A. 熔断器
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【单选题】
137.T68型镗床主轴电动机的高速与低速之间的互锁保护由___实现。
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B. 接触器常闭触点
C. 中间继电器常开触点
D. 热继电器常闭触点
【单选题】
138.T68型镗床主轴电动机只能工作在低速挡,不能高速挡工作的原因是___。
A. 速度继电器故障
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【判断题】
1.熔断器类型的选择依据是负载的保护特性、短路电流的大小、使用场合、安装条件和各类熔断器的适用范围。
A. 对
B. 错
【判断题】
2.低压断路器类型的选择依据是使用场合和保护要求。
A. 对
B. 错
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3.短路电流很大的场合宜选用直流快速断路器。
A. 对
B. 错
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4.交流接触器与直梳接触器的使用场合不同。
A. 对
B. 错
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5.交流接触器与直流接触器可以互相替换。
A. 对
B. 错
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6.△接法的异步电动机可选用两相结构的热继电器。
A. 对
B. 错
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7.Y接法的异步电动机可选用两相结构的热继电器。
A. 对
B. 错
【判断题】
8.中间继电器选用时主要考虑触点的对数、触点的额定电压和电流、线圈的额定电压等。
A. 对
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9.中间继电器可在电流20 A以下的电路中替代接触器。
A. 对
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【判断题】
10.控制按钮应根据使用场合环境条件的好坏分别选用开启式、防水式、防腐式等。
A. 对
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11.启动按钮优先选用绿色按钮,急停按钮应选用红色按钮,停止按钮优先选用红色按钮。
A. 对
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A. 对
B. 错
【判断题】
13.时间继电器的选用主要考虑以下三方面:类型、延时方式和线圈电压。
A. 对
B. 错
【判断题】
14.通电延时型与断电延时型时间断电器的基本功能一样,可以互换。
A. 对
B. 错
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1.M7130型平面磨床的控制电路由交流380 V电压供电。
A. 对
B. 错
【判断题】
2.M7130型平面磨床电气控制线路中的三个电阻安装在配电板外。
A. 对
B. 错
【判断题】
3.M7130型平面磨床中,液压泵电动机M3必须在砂轮电动机M1运行后才能启动。
A. 对
B. 错
【判断题】
4.M7130型平面磨床中,砂轮电动机和液压泵电动机都采用了接触器互锁控制电路。
A. 对
B. 错
【判断题】
5.M7130型平面磨床的三台电动机都不能启动的大多原因是欠电流继电器KUC和转换开关QS2的触点接触不良、接线松脱,使电动机的控制电路处于断电状态。
A. 对
B. 错
【判断题】
6.C6150型车床的主电路中有4台电动机。
A. 对
B. 错
【判断题】
7.C6150型车床电气控制线路中的变压器安装在配电板外。
A. 对
B. 错
【判断题】
8.C6150型车床主轴电动机反转时,主轴的转向也跟着改变。
A. 对
B. 错
【判断题】
9.c6150型车床主电路中接触器KMl触点接触不良将造成主轴电动机不能反转。
A. 对
B. 错
【判断题】
10.Z3040型摇臂钻床的主轴电动机仅作单向旋转,由接触器KMl控制。
A. 对
B. 错
【判断题】
11.Z3040型摇臂钻床控制电路的电源电压为交流110 V。
A. 对
B. 错
【判断题】
12.Z3040型摇臂钻床主轴电动机的控制电路中没有互锁环节。
A. 对
B. 错
【判断题】
13.Z3040型摇臂钻床的主轴电动机由接触器KMl和KM2控制正反转。
A. 对
B. 错
【判断题】
14.Z3040型摇臂钻床加工螺纹时主轴需要正反转,因此主轴电动机需要正反转控制。
A. 对
B. 错
【判断题】
15.Z3040型摇臂钻床中行程开关SQ2安装位置不当或发生移动时会造成摇臂夹不紧。
A. 对
B. 错
【判断题】
16.z3040型摇臂钻床中行程开关SQ2安装位置不当或发生移动时会造成摇臂不能升降。
A. 对
B. 错
【判断题】
17.z3040型摇臂钻床中摇臂不能升降的原因是液压泵转向不对时,应重接电源相序
A. 对
B. 错
【判断题】
18.电气线路测绘前先要了解测绘的对象,了解控制过程、布线规律、准备工具仪表等。
A. 对
B. 错
【判断题】
19.电气线路测绘前要检验被测设备是否有电,无论什么情况都不能带电工作。
A. 对
B. 错
【判断题】
20.测绘T68型镗床电器位置图时,要画出2台电动机在机床中的具体位置。
A. 对
B. 错