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问题
判断题
流体内一点的静压力的大小与作用面的方位无关。
答案
参考答案：对
选择题
____ our teacher will allow ____ early after the examination?
A. Who do you think; leaving
B. Who do you think; to leave
C. Do you think who; leaving
D. Do you think who; to leave
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单项选择题
It happen（）a winter night.
A. at
B. in
C. on
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