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【单选题】
— It's rather cold in here. Do you mind if I close the window?___
A. Yes, please.
B. No, please.
C. Sure, please.
D. I don't like it.
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答案
B
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相关试题
【单选题】
___He teaches physics in a school.
A. What does your father do?
B. Who is your father?
C. What is your father doing?
D. Where is your father now?
【单选题】
— Excuse me, how much is the jacket?___ It's 499 Yuan.
A. Oh, no. That's OK!
B. How do you like it?
C. Which do you prefer?
D. Would you like to try it on?
【单选题】
— Could you help me with my physics, please?___
A. No, no way.
B. No, I couldn't
C. No, I can't.
D. Sorry I can't. I have to go to a meeting right now.
【单选题】
— Could I speak to Don Watkins, please?___
A. Speaking, please.
B. Oh, how are you?
C. I'm listening.
D. I'm Don.
【单选题】
— Could I borrow your car for a few days?___
A. Yes, you may borrow.
B. Yes, go on.
C. Sure, here is the key. Enjoy your journey.
D. It doesn't matter.
【单选题】
— Thank you for inviting me.___
A. I really had a happy time.
B. Oh, it's too late.
C. Thank you for coming.
D. Oh, so slowly?
【单选题】
— May I see your tickets, please?___
A. Sure.
B. No, you can't.
C. No, they are mine.
D. Yes, you can.
【单选题】
— Please help yourself to the seafood.___
A. No, I can't.
B. Sorry, I can’t help.
C. Well, seafood don’t suit.
D. Well, I'm afraid I don't like seafood.
【单选题】
— Would you like to go to the concert with us this evening?___
A. No, I already have plans.
B. I'd love to, but I'm busy tonight
C. No, I really don't like being with you.
D. I'm ill, so I shouldn't go out.
【单选题】
— Congratulations! You won the first prize in today's speech contest.___
A. Yes, I beat the others.
B. No, no, I didn’t do it well.
C. Thank you.
D. It's a pleasure.
【单选题】
— Must I take a taxi? No, you___. You can take my car.
A. had better to
B. don't
C. must not
D. don't have to
【单选题】
— We are going to have a singing party tonight. Would you like to join us?___
A. I'm afraid not, because I have to go to an important meeting.
B. Of course not. I have no idea
C. No, I can’t.
D. That's all set
【单选题】
— How was your trip to London, Jane?___
A. Oh, wonderful indeed.
B. I went there alone.
C. The guide showed me the way.
D. By plane and by bus.
【单选题】
— Hey, Tom, what's up?___
A. Yes, definitely!
B. Oh, not much.
C. What is happening in your life?
D. You are lucky.
【单选题】
— Do you mind my smoking here?___
A. No, thanks.
B. Yes, I do.
C. Yes. I'd rather not.
D. Good idea.
【单选题】
— Did you know that David injured his leg yesterday?Really? ___
A. Who did that?
B. What's wrong with him?
C. How did that happen?
D. Why was he so careless?
【单选题】
— This box is too heavy for me to carry it upstairs.___
A. You may ask for help.
B. I'll give you a hand.
C. Please do me a favor.
D. I'd come to help.
【单选题】
— I wonder if I could use your computer tonight?___ I'm not using it right now.
A. Sure, here you are.
B. I don't know.
C. It doesn't matter.
D. Who cares?
【单选题】
— Excuse me, could you show me the way to the nearest post office?___ Oh yes! Two blocks away from here at the Green Avenue. You can’t miss it.
A. I beg your pardon?
B. What do you mean?
C. You’re welcome.
D. Um, let me think.
【单选题】
— Wow! This is a marvelous room! I’ve never known you’re so artistic.____
A. Great, I am very art-conscious.
B. Don’t mention it.
C. Thanks for your compliments.
D. It's fine.
【单选题】
— Is it possible for you to work late tonight?___
A. I like it.
B. I'll do that.
C. I'd love to. .
D. I think so.
【单选题】
— Unbelievable! I have failed the driving test again!___ This is not the end of the world.
A. Good luck.
B.
C. heer up. C. Go ahead.
D. No problem.
【单选题】
Are you feeling better today, Jack?___
A. There must be something wrong.
B. Just have a good rest.
C. Yes, thank you, doctor. But I still don't feel good.
D. Don’t worry about me.
【单选题】
Thank you so much for your lovely gift.___
A. Never mind.
B. I'm glad you like it.
C. Please don't say so.
D. No, It's not so good.
【单选题】
Would you like something to drink? What about a cup of tea?___
A. No, thanks.
B. No, I wouldn’t
C. Yes, I want.
D. Yes, I like.
【单选题】
What's the problem with your bike?___
A. Not at all.
B. Good, thank you.
C. Nothing serious.
D. Sure.
【单选题】
Good morning, John. How are you doing?___
A. I'm pleased
B. Good night.
C. Not so bad. And you?
D. How do you do?
【单选题】
How do you do?___
A. Fine, thank you.
B. How do you do?
C. Not too bad.
D. Very well.
【单选题】
Good-bye for now.___
A. The same to you.
B. That's OK
C. See you.
D. Long time no see.
【单选题】
Hello, how are you?___
A. Hello, how are you?
B. How do you do?
C. Fine, thank you.
D. That's OK.
【单选题】
I didn't mean to do that. Please forgive me。___
A. Not too bad.
B. That's all right
C. It's a pleasure.
D. Thank you.
【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.
【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.
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【单选题】
齿轮泵在工作过程中,有吸油腔和压油腔,这两个腔就是___。
A. 密封的工作容积;
B. 油缸;
C. 油箱;
D. 油池。
【单选题】
液压系统的油泵运转安全油温是___℃。
A. 20;
B. 30~55;
C. 70~80;
D. 80~100。
【单选题】
在液压系统中,液体压力来源于___。
A. 油缸;
B. 油泵;
C. 油管;
D. 油箱。
【单选题】
液压系统中的压力大小取决于___的大小。
A. 泵的功率;
B. 液压缸活塞面积;
C. 外载荷;
D. 电机功率。
【单选题】
液压油缸是液压系统中的___。
A. 执行机构;
B. 动力机构;
C. 控制机构;
D. 都不是。
【单选题】
调压回路中起主要调压作用的液压元件是___阀。
A. 换向;
B. 溢流;
C. 节流;
D. 单向。
【单选题】
溢流阀的回油管___直接和泵入口连通。
A. 不能;
B. 可以;
C. 随意;
D. 必须。
【单选题】
液压回路在液压系统中是___。
A. 主油路;
B. 辅助油路;
C. 主辅油路均有;
D. 旁路油。
【单选题】
液压系统的吸油高度一般小于___ mm。
A. 100;
B. 200;
C. 300;
D. 500。
【单选题】
高压液压系统中的滤油器一般安装在泵的___上。
A. 吸油管路;
B. 输油管路;
C. 回油管路;
D. 任何一管上。
【单选题】
液压油应有良好的___。
A. 挥发性;
B. 黏合性;
C. 抗乳化性;
D. 透明性。
【单选题】
液压系统中,环境温度越高,所选用的液压油黏度就___。
A. 越低;
B. 越高;
C. 适中;
D. 任意。
【单选题】
347___是控制液体压力的压力控制阀中的一种。
A. 溢流阀;
B. 节流阀;
C. 换向阀;
D. 都不是。
【单选题】
溢流阀的压力调整顺时针转动时,手动压力___。
A. 速降;
B. 缓降;
C. 升高;
D. 不变。
【单选题】
调整溢流阀的压力时,顺时针转动手柄压力___。
A. 不变;
B. 升高;
C. 降低;
D. 适中。
【单选题】
在液压系统中,用来防止油反向流动的部件是___。
A. 泄荷阀;
B. 单向阀;
C. 溢流阀;
D. 截止阀。
【单选题】
在液压传动系统中,用来防止油反向流动的部件是___。
A. 溢流阀;
B. 泄荷阀;
C. 单向阀;
D. 换向阀。
【单选题】
在三位电磁换向阀中,当磁铁不通电时,阀芯应处在___间位置。
A. 左;
B. 右;
C. 中;
D. 任意。
【单选题】
___是控制液体压力的压力控制阀的一种。
A. 溢流阀;
B. 节流阀;
C. 换向阀;
D. 速断阀。
【单选题】
三位阀指阀芯相对阀体三个___的方向控制阀。
A. 中位置;
B. 通路数;
C. 工作位置;
D. 油口。
【单选题】
内漏泄指元件内部___压腔内的泄漏液流。
A. 高低;
B. 低高;
C. 无压;
D. 损坏。
【单选题】
液压系统的清洗常用___。
A. 汽油;
B. 水;
C. 液压工作油或试车油;
D. 柴油或煤油。
【单选题】
检修后的液压缓冲器,各部动作灵活,无犯卡现象,其主缸柱塞的活塞头部和多孔管配合间隙为___mm,同心度为0.03mm。
A. 0.06~0.08;
B. 0.08~0.10;
C. 0.03~0.05;
D. 0.10~0.20。
【单选题】
液压系统检修后,其试验压力应为最大工作压___倍。
A. 1;
B. 1.25;
C. 1.5;
D. 2。
【单选题】
制动带与制动轮毂的间隙一般不少于___mm。
A. 0.1;
B. 0.15;
C. 0.25~0.65;
D. 0.65。
【单选题】
制动器打开时,制动器闸瓦与自动轮的间隙,应保持在___。
A. 0.5-0.7mm;
B. 0.8-1mm;
C. 1.2-1.4mm;
D. 1.5-1.7mm。
【单选题】
制动器检修后,制动轮与闸瓦片间的间隙,在制动轮松开状态下,当轮径为Φ300时为0.7mm,轮径为Φ400时为___mm。
A. 1.5;
B. 1;
C. 0.8;
D. 0.5。
【单选题】
制动带与制动轮毂的接触面应光滑,接触面积应不小于___。
A. 1∕4;
B. 1∕3;
C. 3∕4;
D. l∕2。
【单选题】
液压推杆制动器的制动带应正确地贴在制动轮上,其间隙应为___mm。
A. 0.8~1;
B. 1.5~2;
C. 1.3~1.5;
D. 2~3。
【单选题】
制动器工作时,制动轮温度不得超过___。
A. 250℃;
B. 200℃;
C. 300℃;
D. 350℃。
【单选题】
制动器制动瓦片磨损不超过原厚度的___超过时应更换。
A. 1∕5;
B. l∕4;
C. l∕2;
D. 2∕3。
【单选题】
制动轮表面深火层的淬度为___mm。
A. 0.1-0.5;
B. 1.0-1.5;
C. 2-3;
D. 4-5。
【单选题】
制动器制动带的铆钉的钉头不应有磨损___。
A. 现象;
B. 严重现象;
C. 制动器壳体现象;
D. 制动轮毂现象。
【单选题】
制动瓦片的铆钉沉头与瓦片深不应小于瓦片厚度的___。
A. 1∕5;
B. 1∕3;
C. l∕4;
D. 2∕3。
【单选题】
设有制动器的燃料运输设备,当制动器失灵时___。
A. 禁止使用;
B. 小心使用;
C. 减少负荷使用;
D. 可继续使用。
【单选题】
润滑是减少和控制___的极其重要的方法。
A. 发热;
B. 摩擦;
C. 传动;
D. 磨损。
【单选题】
机械各部件是否正确地安装到工作位置,直接影响到机械的正常运转,关系到摩擦件的磨损速度,决定着___。
A. 机械使用寿命;
B. 摩擦件使用寿命;
C. 机械精度;
D. 机械效率。
【单选题】
磨损现象是非常复杂的,是导致机械零件损坏的___。
A. 唯一原因;
B. 次要原因;
C. 主要原因;
D. 主要原因之一。
【单选题】
机件的磨损是由于机件摩擦面的___引起的。
A. 相对运动;
B. 直接接触;
C. 制造质量不高;
D. 润滑油质差。
【单选题】
维护、保养是否及时得当,对机械设备的使用寿命起着___。
A. 辅助作用;
B. 一定作用;
C. 重要作用;
D. 不起作用。
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