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【单选题】
在相同的水头和孔口直径条件下,通过薄壁小孔口的流量比管嘴的流量()。A.
大
B.
小
C.
相等
D.
不定
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【单选题】Whe she was in America,she___-three foreign languages ,but she___all except a few words of each.
A.
spoke had forgotten
B.
spoke has forgotten
C.
had spoken had forgotten
D.
had spoken have forgotten
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A.
正确
B.
错误
【单选题】It was not _____ she took off her dark glasses _____ I realized she was a famous film star. [ ]
A.
where, that
B.
until, that
C.
until, when
D.
when, then
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