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【单选题】
液体表面分子所受合力的方向总是( )A.
沿液体表面的法线方向,指向液体内部
B.
无确定的方向
C.
沿液体表面的法线方向,指向气相
D.
沿液体表面的切线方向
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皮皮学刷刷变学霸
举一反三
【单选题】He commanded that the student _____the classroom before he returned.
A.
didn't leave
B.
wouldn't leave
C.
not leave
D.
can’t leave
【单选题】______, we decided to leave at once, as we didn't want to risk missing the bus.
A.
As it being pretty late
B.
It being pretty late
C.
It was being pretty late
D.
Being pretty late
【单选题】He ______ the key, so we ______ into the office.
A.
hadn’t left; can’t
B.
didn’t leave; couldn’t have got
C.
hadn’t left; couldn’t get
D.
hasn’t left; couldn’t get
【单选题】We didn’t look after the old woman ____ we had an important meeting yesterday. [ ]
A.
as soon as
B.
until
C.
since
D.
so
【简答题】__________, we decided to leave at once, as we didn't want to risk missing the bus. A. As it being pretty late B, It being pretty late C. It was being pretty late D. Being pretty late
【简答题】进入大气装置创建面板的方法是:单击创建面板上的 _______ 按钮,单击标准下拉列表,选择大气装置选项。
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