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【单选题】
制备稳定的混悬剂,需控制 ζ电位的范围是 ()A.
20～40mV
B.
10～25mV
C.
20～25mV
D.
25～35Mv
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【简答题】The water is flowing in a 300-mm-diameter pipe with length l=120mm. the pressure drop from starting to ending is The water discharge in the pipe is . Determine the frictional coefficient.
【简答题】在所有旅游收入中储蓄量及用于进口和其他对外支付的数量越大，乘数效应也就越（）。
【简答题】These are ideal rooms．（改为单数句子） This is_______ ideal_______ ．
【简答题】在所有旅游收入中储蓄量及用于进口和其他对外支付的数量越大,乘数效应也就越 _____ 。
【判断题】The tap water is flowing water, and its oxygen content is pretty high which can benefit the volatilization of the tea scent.
A.
正确
B.
错误
【单选题】A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.
A.
high density will be on the left in the Northern Hemisphere
B.
high density will be on the right in the Southern Hemisphere
C.
low density will be on the left in the Northern Hemisphere
D.
low density will be on the left in the Southern Hemisphere
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