乙酰胆碱作用的主要消除方式是A．被单胺氧化酶所破坏 B．被磷酸_爱下问搜题

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问题单项选择题

乙酰胆碱作用的主要消除方式是

A．被单胺氧化酶所破坏

B．被磷酸二酯酶破坏

C．被胆碱酯酶破坏

D．被氧位甲基转酶破坏

E．被神经末梢再摄取

答案

参考答案：C

完形填空

完形填空。

Dear Bob,
       My name is Wang Jie. I want __1__ your pen pal. I live in Beijing, __2__ . I think Canada is a
very beautiful __3__.I'm 14 years old and my birthday is __4__ September. I can __5__ a little
English. I have __6__ brother or sister. I like to stay __7__ my classmates. We often play __8__
after school, such as football, basketball, tennis and running. My favorite __9__ at school is math. I
don't like English. It's too _10__ . Let's be good pen pals.
                                                                                                                                              Yours ,
                                                                                                                                           Wang Jie

( )1.  A. be
( )2.  A. Shanghai
( )3.  A. country
( )4.  A. on
( )5.  A. speak
( )6.  A. a
( )7.  A. at
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( )9.  A. color
( )10.A. difficult

B. to be
B. Singapore
B. city
B. at
B. say
B. some
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B. soccer
B. subject
B. different

C. to do
C. China
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C. of
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C. for
C. for
C. sports
C. fruit
C. easy

D. to have
D. Chinese
D. village
D. in
D. tell
D. no
D. with
D. with
D. teacher
D. interesting

单项选择题 A1/A2型题

正常细胞膜外Na⁺浓度约为膜内Na⁺浓度的（）

A.2倍

B.8倍

C.12倍

D.18倍

E.22倍