禁用于前列腺肥大患者的抗心律失常药 A．普鲁卡因胺 B．丙吡胺_爱下问搜题

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问题单项选择题

禁用于前列腺肥大患者的抗心律失常药

A．普鲁卡因胺
B．丙吡胺
C．维拉帕米
D．胺碘酮
E．奎尼丁

答案

参考答案：B

完形填空

       There are many different ways of seeing a town for the first time. One of them is to walk around it, guide-book in hand. Of course, we may   1   with our guide-books the history and special developments of a town and get to know them.  2   then, if we take our time and   3   in a town for a while, we may get to know it better. When we   4   it as a whole, we begin to have some   5   , which even the best guide-books do not answer. Why is the town just   6   this, this shape, this plan, this size? Why do its streets   7   in this particular way, and not in any   8   way?
       Here even the best guide-book fails us. One can’t find in it the information about how a town has developed to the   9   appearance. It may not describe the original (最初的) design of a town. However, one may get some idea of what it  10   look like by walking around the town. One can also imagine  11   the town was first planned and built. Then one can learn more about in what direction the town   12   to develop.
       What is the point of studying towns in this way? For me, it is simply that one gets a greater depth of pleasure by visiting and seeing a town with one’s own eyes. A   13   visit to a town may help one better understand why it is attractive  14   just reading about it in a guide-book.

( )1. A. write
( )2. A. But
( )3. A. march
( )4. A. look at
( )5. A. ideas
( )6. A. of
( )7. A. open
( )8. A. one
( )9. A. old
( )10. A. used to
( )11. A. what
( )12. A. stops
( )13. A. costly
( )14. A. from

B. study
B. Before
B. work
B. look after
B. opinions
B. for
B. run
B. more
B. normal
B. seemed to
B. how
B. appears
B. formal
B. than

C. tell
C. Since
C. stay
C. look for
C. feelings
C. like
C. begin
C. other
C. first
C. had to
C. when
C. starts
C. group
C. through

D. remember
D. Until
D. wait
D. look up
D. questions
D. as
D. move
D. such
D. present
D. happened to
D. where
D. continues
D. personal
D. with

实验题

利用图所示的电路可以测定未知电阻R的阻值，已知电源两端电压恒定，请将下面的实验步骤补充完整：

（1）将单刀双掷开关S接，读出电流表的示数为；

（2）将单刀双掷开关S接__________，______________________________；

（3）读出电阻箱的阻值，则R的阻值为__________。