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【单选题】
流体在圆层流流动 , 若只将流体流速提高一倍 , 流体流动型态仍为层流 , 则阻力损失为原来的( )倍。A.
1
B.
2
C.
4
D.
1/2
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【单选题】Most people think that English is ___________ useful language, but some students think it’s ___________ unimportant subject.
A.
a, an
B.
a, a
C.
an, an
D.
an, a
【简答题】JSP页面的page指令中的( )属性用于设置脚本语言。
【简答题】Why do you think some people dislike brands?
【简答题】JSP页面的Page指令中的____________属性用于设置脚本语言
【单选题】. — Do you think there is anything ____ interest in the exhibition? — Yes, I think some of the pictures are ____.
A.
for; of help
B.
of; of great help
C.
in; of helpful
D.
at; helpful
【单选题】Most people think that English is _____ useful language, but some students think it's _____ unimportant subject. [ ]
A.
a, an
B.
a, an
C.
an, an
D.
an, a
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