在放大电路中，为了稳定输出电流，不应引入（）。 A.电压负反馈 B.电压正反馈 C.

发布时间：2018-11-28 02:36 │ 来源：www.tikuol.com

题型：多项选择题

问题：

在放大电路中，为了稳定输出电流，不应引入（）。

A.电压负反馈

B.电压正反馈

C.电流负反馈

D.电流正反馈

考点：铁路机车电气装修工铁路机车电气装修工(中级)铁路机车电气装修工(中级)题库

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— ____________ does she work?

— She works in a car company. [ ]

A. What

B. Where

C. When

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有四个物体a、b、c、d，物体a、b运动的x-t图象如图甲所示：物体c、d从同一地点沿同一方向运动的v-t图象如图乙所示．根据图象做出的以下判断正确的是（　　）

A．在0-3s的时间内，物体a运动的位移为10m

B．物体a和b均做匀速直线运动且a的速度比b大

C．t=3s时，物体c追上物体d

D．在物体c追上物体d之前，t=3s时，c、d之间距离最大

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国内铁路运输的优点不包括（）。

A.运行速度较快

B.安全性高，损耗率低

C.运输成本较低

D.运输能力大

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     Mr Glen is a millionaire. Five years ago, after returning from abroad to his motherland, he__1__up his
small company. Speaking of success, Glen often tells us a story about his__2__expensive "school" fee. He
always owes his success to it. At that time, Glen, who already got a Ph.Degree, decided to return to the
homeland, starting a company. Before__3__, he bought a Rolex watch with the __4__made through
years of work after school and the scholarships.
     At the airport he had to accept the routine customs check. The watch on his wrist was also demanded
to be __5__ down for inspection. Glen knew that carrying the __6__goods out had to pay the tax. And
he worried about paying__7__ for his watch. So when he was checked, he told a lie that his watch was
a worthless__8__. When he was__9__of his "smarts", immediately, __10__ the presence of Glen, the
officers hit the watch, which__11__ nearly ￥100,000, into pieces at hearing Glen's words. Glen was
amazed.__12__ he understood why, he was taken to the office to be__13__ strictly. For many times of
entry exit __14__he knew that only those people in the "blacklist" would "enjoy" this special treatment.
The officers looked out everything carefully in the box, and warned him __15__ time of entry and exit he
must accept the check and if __16__ reusing and carrying fake and shoddy(劣质的)goods, he would be
charged according to law！Suddenly, his face turned red, and he had nothing in mind after__17__ the
plane for long.
     After returning to the homeland, he often told the story to his family, and his employees, too. He said
that this made a deep__18__ on him, because the additional high "school" fee that he had ever paid made
him realize the value of __19__,  which he would__20__as the secret of his success forever.

( )1. A. set
( )2. A. good
( )3. A. staying
( )4. A. books
( )5. A. put
( )6. A. ordinary
( )7. A. one
( )8. A. present
( )9. A. afraid
( )10. A. in
( )10. A. paid
( )12. A. Before
( )13. A. appreciated
( )14. A. conditions
( )15. A. no matter what
( )16. A. came out
( )17. A. landing
( )18. A. expression
( )19. A. honesty
( )20. A. remember

B. came
B. bad
B. leaving
B. things
B. looked
B. common
B. it
B. trade
B. proud
B. on
B. spent
B. After
B. beaten
B. experiences
B. no matter how
B. found out
B. flying
B. idea
B. lies
B. learn

C. went
C. extra
C. living
C. savings
C. taken
C. specific
C. them
C. toy
C. well
C. before
C. took
C. If
C. spoken
C. experiments
C. no matter when
C. sent out
C. catching
C. thought
C. goods
C. revise

D. called
D. few
D. coming
D. pounds
D. lied
D. many
D. these
D. fake
D. hard
D. after
D. cost
D. Though
D. examined
D. chances
D. no matter why
D. set out
D. boarding
D. impression
D. things
D. read

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多层民用建筑砌体房屋，由于横墙较（），一般都属于（）房屋。

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