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【单选题】
图6－33中，水平不透水层上的细沙含水层渗透系数k，两廊道中水位为h、h，相距l，则渗流流量q是( )。A.
B.
C.
D.
都不正确
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【简答题】It is possible that participants between the ages of 18 and 19 responded differently than those between the ages of 20 and 21.
【单选题】Between 19 94 and 2002 , the number of overseas visitors expanded ________ 16 %.
A.
by
B.
for
C.
to
D.
in
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【单选题】It would have been virtually impossible to collect all the information needed.
A.
unfortunately
B.
practically
C.
statistically
D.
surprisingly
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