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【单选题】
某种电子元件的使用者要求，一批元件的废品率不能超过2‰，否则拒收。 在上述检验中，0.05显著性水平对应的标准正态分布临界值是（）。A.
1.645
B.
±1.96
C.
-1.645
D.
±1.645
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【单选题】There are _____________ eggs in the basket. [ ]
A.
fewer
B.
a few
C.
a little
D.
little
【单选题】There are ________ eggs in the basket.
A.
scores of
B.
score of
C.
three scores
D.
three scores of
【单选题】There _ plenty of _ in the basket. [ ]
A.
are, orange
B.
are, oranges
C.
is, orange
D.
is, orange
【单选题】'There _______ some orange in the bottle, but there _______ any bananas in the basket. [ ]
A.
was, weren't
B.
wasn't, were
C.
weren't, were
D.
were, weren't
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