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【单选题】
g骨骼肌兴奋收缩耦联的连接因子是____。A.
Ca+
B.
Na+
C.
K+
D.
Cl-
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举一反三
【单选题】A: Do you think leaving school at 16 was a mistake?
A.
B: It WAS a big mistake.
B.
B: It was A big mistake.
C.
B: It was a BIG mistake.
D.
B: It was a big misTAK
【简答题】When and where were the memos published?
【单选题】—Such a stupid mistake could have been avoided. —Unfortunately, he______the mistake again and again.
A.
repeated
B.
would repeat
C.
had repeated
D.
would have repeated
【简答题】Where and when were workers’ compensation laws originated? When were they introduced in the United States? Were workers’ compensation laws in the United States issued nationally or by state?
【简答题】When and where were the two World Expositions held respectively in China?
【简答题】人工挖孔桩,长钢套管护壁 ,1~3根桩、条形桩基沿垂直轴线方向和群桩基础易的边桩 ,桩位的允许偏差()
【单选题】人工挖孔桩,长钢套管护壁 , 1~3 根桩、条形桩基沿垂直轴线方向和群桩基础中的边桩 ,桩位的允许偏差()
A.
± 20
B.
± 50
C.
± 75
D.
± 100
【单选题】---That must be a mistake. ---No, it ___ a mistake.
A.
must not be
B.
needn’t be
C.
cannot be
D.
may be not
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