以下属于操作过电压的是（）。 A.工频电压升高 B.电弧接地过电压 C.变电所侵入波

发布时间：2017-08-19 18:14 │ 来源：www.tikuol.com

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问题：

以下属于操作过电压的是（）。

A.工频电压升高

B.电弧接地过电压

C.变电所侵入波过电压

D.铁磁谐振过电压

考点：电气工程专业基础电气工程基础电气工程基础题库

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小医生,下列各句均有一处错误,请找出并改正。

1.We are going to learn the fifty lesson tomorrow._____

2.He wants somebody help him._____

3.The park is next the bank._____

4.There are some foreign students on the school gate._____

5.Why not eating some vegetables?_____

6.—What do you usually come to school?

—On foot._____

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JJG14-1997检定规程规定，首次检定TGT—100型台秤，在检至500kg秤量点进行灵敏度测试，当计量杠杆处于平衡位置时，轻缓施加1.5e300g砝码，由此引起计量杠杆的恒定位移至少应为（）。

A.3mm

B.4mm

C.2mm

D.4mm

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题型：单项选择题

完形填空。

     I devote myself to music because of my grandmother. My mom and I lived with grandparents from the
time I was two until I was eight. And even then, I was at their house before and after school every day
while my mother was   1   .
    Grandma loved music. It was she that first   2   me to Elvis Presley as a very young child, and once I
heard his music, I was truly in   3   with it. Most five-year-olds ask for   4   for birthdays, but I wanted
Elvis' albums. I would play them non-stop and   5   to the music in my grandma's family room though my
movements didn't look   6   .
     Grandma played the piano and   7   me to sing "America the Beautiful" and "Somewhere over the
Rainbow". I   8   started playing music on the piano, and soon Grandma was paying for me to take piano
lessons from a lady living in the   9   . I would come home from   10   and walk there for my lesson. I   11
took about nine months of lessons, but it was enough to give me a(n)   12  and allow me to continue to
teach myself.
     Last month when I came home to visit Grandma in the hospital, I brought along my guitar with me. She
was   13   , but the music seemed to   14   her soul. She had me sing some songs and when I started to sing "Somewhere over the Rainbow", her weakened voice   15   in with mine for a few lines. That experience
was one of the most   16   of my lifetime and one I will certainly cherish forever. I told her of my music
career and she was very   17   and said, "That's wonderful!" I   18 .
to play for her throughout the week I was home.
     My grandma   19   two days ago. In my opinion, part of her will live on through every   20   I write or
sing in my life.

( )1. A. at home
( )2. A. sent
( )3. A. debate
( )4. A. music
( )5. A. wave
( )6. A. funny
( )7. A. forced
( )8. A. generally
( )9. A. hotel
( )10. A. school
( )11. A. exactly
( )12. A. explanation
( )13. A. in deep sorrow
( )14. A. comfort
( )15. A. joined
( )16. A. genuine
( )17. A. energetic
( )18. A. refused
( )19. A. passed away
( )20. A. song

B. at school
B. left
B. love
B. benefit
B. sleep
B. balanced
B. prepared
B. finally
B. apartment
B. hospital
B. only
B. celebration
B. in great pain
B. spot
B. poured
B. impressive
B. calm
B. expected
B. died away
B. poem

C. at work
C. remembered
C. agreement
C. gifts
C. dance
C. good
C. enabled
C. fortunately
C. neighborhood
C. street
C. completely
C. translation
C. in high spirits
C. attract
C. mixed
C. puzzling
C. exhausted
C. continued
C. passed by
C. article

D. in hospital
D. introduced
D. doubt
D. toys
D. play
D. interesting
D. taught
D. suddenly
D. hospital
D. office
D. seldom
D. foundation
D. in big trouble
D. terrify
D. combined
D. unbelievable
D. pleased
D. pretended
D. died out
D. composition

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女性，21岁学生，不慎溺水后2小时出现呼吸困难急诊入院。查体：BP90/60mmHg、R40,/分、P120/分。烦躁不安，唇发绀，双肺可闻及湿哕音，胸片示双肺呈大片状浸润阴影。

假设诊断成立，在治疗中应及早使用的是

A．高浓度鼻导管吸氧

B．增加输液量

C．面罩吸氧

D．PEEP

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题型：单项选择题

如图是人体特异性免疫的过程示意图（图中序号表示过程，英文字母表示细胞），请回答：

艾滋病是由HIV所引起的（）。HIV是一种RNA病毒，能够侵入和隐藏在人体T淋巴细胞内部，并嵌入染色体，随人体基因一起复制，因而难以研制出能抵HIV的疫苗。研究发现，在少数情况下，感染HIV的人会许多年没有明显的症状，这发现表明HIV虽然侵入了人体，但在相当长的一段时间内可能没有复制，而是处于静息状态，这提示我们可以从何处着手研究艾滋病的防治方法？（）

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