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【单选题】
下列关于兴奋传导的叙述，正确的是（）A.
神经纤维膜内局部电流的流动方向与同侧的兴奋传导方向相反
B.
神经纤维上兴奋的传导不需要消耗能量
C.
突触小体完成“化学信号→电信号”的转变
D.
神经递质释放后作用于突触后膜，也需要借助于体液传递
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【简答题】Nowadays the Internet is wildly used for studying, shopping, entertainment, etc. on the campus. Some people say that the Internet facilitates students lives while others dont agree. What is your opini...
【单选题】Let’s hope the fine weather ______ for Sunday’s camping trip.
A.
keeps up
B.
picks up
C.
carries on
D.
puts up
【单选题】Everything was perfect for the picnic _____ the weather.
A.
in place of
B.
as well as
C.
except for
D.
in case of
【单选题】. The ________ flight CA9525 for 11:30 a.m. is to be put off because of the stormy weather.
A.
formal
B.
regular
C.
ordinary
D.
common
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