用伏安法测电阻时，如待测电阻Rx约为150Ω，电流表内阻RA约为20Ω，电压表内

发布时间：2017-05-18 15:49 │ 来源：www.tikuol.com

题型：实验题

问题：

用伏安法测电阻时，如待测电阻R_x约为150Ω，电流表内阻R_A约为20Ω，电压表内阻R_V约为5KΩ，应该用图中的　　　电路（填①或②）来测量可以尽量减小误差。当用电路图①进行测量时，测量值将比真实值偏　　　（填大或小）；当用图②进行测量时测量值比真实值偏　　　（填大或小）。

考点：实验：伏安法测电阻实验：练习使用示波器实验：测绘小灯泡的伏安特性曲线实验：探究影响导体电阻的因素

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写同音字，并组词。

1．汇（汇合）会（） ____（） ____（） ___（）

2．弃（） ___（） ____（） ____（） ___（）

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作为评估机构为资产评估项目承担法律责任的证明文件，资产评估报告（）。

A.包括正文和附件两部分

B.包括正文、附件和法律意见

C.仅有正文部分

D.包括正文和确认文件

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题型：实验题

完形填空。

      What would you do if the teacher asked you to give a speech in front of the whole school? If you
answered "I'd say that I  1 a cold", then you are probably a  2 person. You like taking to one or two
people  3 talking to a group. You would also rather stay at home and read a good book than   4 to a
party. You have a small circle of very good friends. Your friends would probably say you are a good   5 .
     What would you do  6 someone asked you to be in a movie? Would you say if your friends could also
be with you? If your answer is "  7  ", then you are outgoing and fairly confident. You have  8 friends,
and you enjoy the company of the other people. People come  9 you when they want advice. Your friends
would say you are  10 to get along with.
      What would you do if your classmate borrowed your pen  11 permission? Would you start borrowing
his without permission? If the answer is "Yes", it  12  that you are probably pretty confident. Social situations
don't  13 you in the slightest. You know what you want, and you know  14 to get it. Sometimes you might
annoy people because you are too  15 .
    My friends, could you give me your own replies to these questions?

( )1. A. have
( )2. A. shy
( )3. A. rather than
( )4. A. going
( )5. A. listener
( )6. A. when
( )7. A. No
( )8. A. plenty
( )9. A. for
( )10. A. difficult
( )11. A. without
( )12. A. thinks
( )13. A. bother
( )14. A. what
( )15. A. scared

B. will have
B. confident
B. instead of
B. to go
B. teacher
B. if
B. Yes
B. few
B. up
B. boring
B. for
B. makes
B. make
B. how
B. creative

C. had
C. serous
C. than
C. went
C. speaker
C. after
C. Excuse me
C. many
C. on
C. easy
C. with
C. shows
C. surprise
C. where
C. nervous

D. am having
D. energetic
D. instead
D. go
D. reader
D. before
D. Never mind
D. much
D. to
D. frustrating
D. to
D. talks
D. interest
D. when
D. confident

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题型：实验题

如何评价铅酸蓄电池的寿命？

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题型：实验题

湿热浸淫，气血不运型见症为（）

A.病起发热，或热后突然出现肢体软弱无力

B.四肢痿软，身体困重

C.肢体痿软无力，逐渐加重，神疲乏力

D.起病缓慢，下肢痿软无力，腰脊瘦软

E.突然昏仆，半身活动不利

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