【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?
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相关试题
【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.
【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?
推荐试题
【单选题】
汽轮机EH油压低至___时，汽轮机跳闸。
A. 9.8Mpa
B. 9.08 Mpa
C. 0.98 Mpa
D. 8.9 Mpa
【单选题】
汽轮机低压缸胀差达___时，汽轮机跳闸。
A. -4.5mm或+7.5mm
B. -4mm或+7mm
C. -4mm或+7.5mm
D. -4.5mm或+7mm
【单选题】
凝结泵母管压力低至___时，启动备用凝结泵。
A. 2.0Mpa
B. 1.5Mpa
C. 1.2 Mpa
D. 2.5Mpa
【单选题】
汽轮机排汽装置背压高报警值为___
A. ≥0.055Mpa
B. ≥0.55 Mpa
C. ≥0.27Mpa
D. ≥0.027 Mpa
【单选题】
给水泵出口流量___时，开给水泵再循环门。
A. ≥120t/h
B. ≥165t/h
C. ≤120t/h
D. ≤165t/h
【单选题】
汽轮机启动前主油箱油位应补至___
A. 0.55m以上
B. 0.56m以上
C. 0.57m以上
D. 0.58m以上
【单选题】
在汽轮机盘车状态下，要求顶轴油压力维持在___
A. 8.81～16.62MPa
B. 8.82～16.62MPa
C. 8.82～16.64MPa
D. 8.81～16.64Mpa
【单选题】
当汽轮机真空高于___时，投入低真空保护。
A. 0.065MPa
B. 0.066MPa
C. 0.067MPa
D. 0.068Mpa
【单选题】
汽轮机3000rpm定速后，各轴承振动不得超过___
A. 0.02mm
B. 0.03mm
C. 0.04mm
D. 0.05mm
【单选题】
汽轮机D修后启动，3000rpm定速后应进行的试验有___
A. 主汽门严密性试验
B. 调门严密性试验
C. 喷油试验
D. 主汽门活动性试验
【单选题】
汽轮机并网带负荷后，当凝结水质不合格时，机组负荷不得超过___
A. 10MW
B. 15MW
C. 20MW
D. 25MW
【单选题】
汽轮机停运过程中，机组负荷降至___时停运高加汽侧。
A. 30MW
B. 35MW
C. 40MW
D. 45MW
【单选题】
汽轮机停机过程中，当机组负荷降至___时，开启各抽汽管道疏水电动门。
A. 15MW
B. 20MW
C. 25MW
D. 30MW
【单选题】
我中心汽轮机全真空惰走时间为___
A. 30min
B. 35min
C. 40min
D. 45min
【单选题】
汽轮机停机后，当高压缸下部内壁温度达___可间断性盘车。
A. 200℃
B. 250℃
C. 300℃
D. 350℃
【单选题】
顶轴油泵入口压力低于___时，顶轴油泵无法启动或跳闸。
A. 0.2MPa
B. 0.02MPa
C. 0.2KPa
D. 0.02KPa
【单选题】
顶轴油泵安全阀整定值是___
A. 20.56MPa
B. 20.57MPa
C. 20.58MPa
D. 20.59MPa
【单选题】
EH油系统溢油阀动作值是___
A. 17±0.05MPa
B. 17±0.5MPa
C. 17±0.02MPa
D. 17±0.2MPa
【单选题】
当凝结水过滤器进出口差压达___时，凝结水过滤器自动解列。
A. ≥0.05MPa
B. ≥0.02MPa
C. ≥0.1MPa
D. ≥0.2MPa
【单选题】
当凝结水温度超过___时，凝结水过滤器自动解列。
A. 120℃
B. 80℃
C. 70℃
D. 50℃
【单选题】
当除氧器水位正常，水温___后，向给水泵通水；
A. ＞50℃
B. ＞60℃
C. ＞70℃
D. ＞80℃
【单选题】
高加投运时，应将加热器汽侧压力维持在___
A. 0.05-0.01MPa
B. 0.05-0.1MPa
C. 0.01-0.5MPa
D. 0.1-0.5MPa
【单选题】
当高加汽侧压力与除氧器压差___时，将高加输水切换至热井。
A. ＜0.5MPa
B. ＜0.3MPa
C. ＜0.2MPa
D. ＜0.1MPa
【单选题】
当发生___时，给水泵必须立即停运
A. 给水泵密封水压力低，机械密封处漏水；
B. 液力偶合器摆动；
C. 润滑油压力偏低；
D. 给水泵气化，出口压力、电流摆动或降低；
【单选题】
正常情况下，一个月内EH油箱油位下降值为___
A. ≯15mm
B. ≯18mm
C. ≯20mm
D. ≯25mm
【单选题】
在停机中，如果发现润滑油泵故障，应如何处理___
A. 破坏真空停机；
B. 不破坏真空停机；
C. 立即并网运行
D. 保持额定转速空负荷运行；
【单选题】
汽轮机在启动时，低速暖机已结束，润滑油泵故障，油压逐渐下降，应如何处理___
A. 破坏真空停机；
B. 不破坏真空停机；
C. 迅速提升汽轮机转速；
D. 迅速降低汽轮机转速；
【单选题】
在相同的负荷下,中间级压力升高或同样的进汽参数下负荷下降，汽轮机可能发生了___
A. 通流部分结垢；
B. 汽轮机叶片断裂；
C. 调门突然关闭；
D. 机组背压过高；
【单选题】
主蒸汽参数低，通流部分过负荷，可导致汽轮机___
A. 轴向位移增加；
B. 轴向位移减小；
C. 轴向动静间隙减小；
D. 机组背压过高；
【单选题】
汽轮机发生水冲击，转子惰走时间缩短，盘车4小时后___
A. 禁止再次启动；
B. 可以再次启动；
C. 请示总工决定；
D. 视机组偏心值而定；
【单选题】
汽轮机通流部分发生异音或瞬间发出清晰的金属冲击声，汽轮机可能发生了___
A. 动静部分发生摩擦；
B. 水冲击事故；
C. 叶片断裂事故；
D. 过负荷事故；
【单选题】
蒸汽品质不合格，汽轮机通流部分静叶严重结垢，可能导致汽轮机___
A. 高压缸胀差增大；
B. 轴向位移增加；
C. 机组效率增加；
D. 轴向间隙增加；
【单选题】
汽轮机升速中转速低于一级临界转速时，要求轴振超过___，应立即打闸停机。
A. 0.23mm；
B. 0.24mm；
C. 0.25mm；
D. 0.26mm；
【单选题】
汽轮机通过临界转速时的轴承振动超过___时，应立即打闸停机。
A. 0.1mm；
B. 0.15mm；
C. 0.2mm；
D. 0.25mm；
【单选题】
当周波低于___，联系值长，要求与系统解列，保厂用；
A. 45HZ；
B. 46HZ；
C. 47HZ；
D. 48HZ；
【单选题】
对流体的平衡和运动规律具有主要影响的是___。
A. 黏性；
B. 压缩性；
C. 膨胀性；
D. 表面张力。
【单选题】
汽轮机中常用的和重要的热力计算公式是___。
A. 理想气体的过程方程式；
B. 连续方程式；
C. 能量方程式；
D. 动量方程式。
【单选题】
汽轮机纯冲动级的最佳速比为___
A. 1/2；
B. 1/4；
C. 3/4；
D. 都不是。
【单选题】
汽轮机油循环倍率最合适的范围是___。
A. 2～3；
B. 8～10；
C. 10～15；
D. 15～20。
【单选题】
蒸汽对金属的放热系数与蒸汽的状态有很大的关系，其中___的放热系数最低。
A. 高压过热蒸汽；
B. 湿蒸汽；
C. 低压微过热蒸汽；
D. 饱和蒸汽。
