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【单选题】
下列流体特征描述错误的是?A.
液体在重力作用下，总保持着一个自由表面，气体充满着容纳它的整个空间。
B.
流体具有流动性，但液体气体的流动性大小不同。
C.
液体容易被压缩,气体难被压缩。
D.
流体分子间存在吸引力和动量交换，当其流动时表现为阻碍流体的性质称为流体的粘性。
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举一反三
【单选题】Of the seven days in the a week, Saturday is said to be the most popular _____ for a wedding in some countries. [ ]
A.
way
B.
situation
C.
event
D.
choice
【单选题】He said he would come to see us the next afternoon.
A.
sometime
B.
some time
C.
sometimes
D.
some times
【简答题】George Orwell once said he wrote 'because there are some lies I want to expose, some fact to which I want to draw attention'. Illuminate this through the general ysis of the themes of his works.
【简答题】Some Internet addicts said their on-line usage was ______.
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