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【单选题】
关于补体描述正确的是
A.
是一组受抗原刺激而产生的具有酶活性的蛋白质
B.
是热稳定的物质
C.
具有溶菌作用不参与抗病毒感染
D.
既参与生理性免疫也能介导免疫病理作用
E.
补体的作用可随时发生
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【单选题】——Nobody knows which team will win the 2018 World Cup in Russia. ——Yes. That is the ______of the beautiful game.
A.
question
B.
luck
C.
hope
D.
magic
【单选题】下列哪一项会导致粮食制品的均衡价格下降
A.
鸡蛋价格的增加
B.
良好的气候条件
C.
牛奶价格的下降
D.
收入的下降
【单选题】下列哪一项会导致粮食制品的均衡价格下降
A.
鸡蛋价格的增加
B.
良好的气候条件
C.
C 牛奶价格的下降
D.
D 收入的下降
【单选题】According to the passage, which of the following statements is NOT true?
A.
Nobody knows for sure whether oil prices will go up or down in the future.
B.
China's increasing demand led OPEC to miscalculate production capacity.
C.
There has been little gains in average fuel mileage efficiency.
D.
The world will depend more on the Persian Gulf in the future.
【单选题】设 在 处可导, 为常数,则 ( )
A.
B.
C.
D.
.
【单选题】Nobody knows next.
A.
what to do
B.
to do what
C.
which to do
D.
how to do
【简答题】设 在 处可导,则常数 ____.
【单选题】设函数 在 处可导,则常数 与 的值分别为( ).
A.
2, 1
B.
1, 2
C.
1, 1
D.
0, 0
【单选题】---Nobody knows which team will win the 2022 World Cup in Qatar . ----Yes. That's the ______ of the beautiful game.
A.
question
B.
luck
C.
hope
D.
magic
【单选题】Nobody knows what triggered the event, which______ a million cubic meters of water per second, obliterating the barrier between Britain and France.
A.
released
B.
relieved
C.
restored
D.
retained
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