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【单选题】
给水泵站中,水泵吸水管的流速在确定根据管径的不同来考虑。当D=250-1000mm时,v=( )m/s。A.
1.0-1.2
B.
1.2-1.6
C.
1.6-2.0
D.
1.5-2.5
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举一反三
【单选题】The college student lost his life trying to save the drowning child, ________ he will always be remembered.
A.
in which
B.
about which
C.
by which
D.
for which
【单选题】Newspapers are trying to save themselves by doing the following EXCEPT ______.
A.
shifting the mix of the reports towards lifestyle. and entertainment
B.
planning more subjects relevant to daily lives and politics
C.
creating new programs on-and offiine
D.
investing in daily papers free of charge
【单选题】Newspapers are trying to save themselves by doing the following except______.
A.
shifting the mix of the reports towards lifestyle. and entertainment
B.
planning more subjects relevant to daily lives and politics
C.
creating new programs on-and offline
D.
investing in daily papers free of charge
【单选题】Green organizations are trying to save rain forests that have been _____ by farmers.
A.
created
B.
ruined
C.
threatened
D.
protected
【单选题】With the oil price rising, these days people are trying to work close to home ____ save money on gas. [ ]
A.
helps
B.
helped
C.
helping
D.
to help
【简答题】拜访的礼仪应注意哪些方面？
【简答题】拜访亲友应注意哪些礼仪？
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