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搜题
【单选题】
红细胞和血红蛋白绝对值增多的原因是
A.
反复腹泻
B.
排汗过多
C.
连续呕吐
D.
真性红细胞增多症
E.
大面积烧伤
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举一反三
【单选题】____________ Jenny always take the bus ?
A.
Do
B.
Does
C.
Did
【简答题】Did the speaker always like the car?______, he changed.
【单选题】由于短期内固定成本为一个常数,不受产量的影响,因而( )就是产量变动引起的可变成本的变动。
A.
机会成本
B.
平均成本
C.
边际成本
D.
隐成本
【单选题】— He hardly hurt himself in the accident, did he﹖ —_______ He is always careless.
A.
No, he did.      
B.
  Yes, he did.
C.
No, he didn’t.
【单选题】由于短期内固定成本为一常数,不受产量的影响,因而( )就是产量变动引起的可变成本的变动。
A.
机会成本
B.
平均成本
C.
边际成本
D.
隐成本
【单选题】When he did go to school, he ______.
A.
was always late
B.
tried to leave early
C.
was always happy.
【单选题】So clearly _____ English that he can always make himself understood
A.
does he speak
B.
he speaks
C.
did he speak
D.
he spoke