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【单选题】有机磷农药中毒时,骨骼肌痉挛主要是由于
A.
ACh释放减少
B.
ACh释放增多
C.
胆碱酯酶活性降低
D.
胆碱酯酶活性增强
E.
终板膜上的ACh门控通道功能增强
【单选题】If you invest so heavily in the stock market, you're______risks.
A.
turning in
B.
heading off
C.
turning on
D.
heading for
【单选题】The plant is dead. I _____ it more water.
A.
will give
B.
would have given
C.
must give
D.
should have giv
【简答题】If you can invest in part of a project, it is ______.
【单选题】According to Konstantinos, the biggest risk of portfolio is that ______.
A.
you invest in any type of security
B.
the portfolio can not achieve the right balance
C.
you continue a risky portfolio
D.
your portfolio does not have enough risk
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