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【单选题】
Presynaptic inhibition is caused by:A.
presynaptic membrane is hyperpolarized
B.
postsynaptic membrane is hyperpolarized
C.
inhibitory NT is released from presynaptic membrane
D.
excitatory NT released from presynaptic membrane decrease
E.
excitatory NT released from presynaptic membrane increase
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【单选题】____ evening, we are on the ____ to Chengdu. [ ]
A.
Toward; back way
B.
Towards the; way back
C.
Towards the; back way
D.
Toward; way back
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A.
软件下载
B.
远程登录Telnet
C.
WWW浏览
D.
新闻广播
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A.
amount
B.
requirement
C.
burden
D.
data
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A.
正确
B.
错误
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