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【多选题】
属于 π键主要特点的有
A.
不能单独存在,只与 σ键同时存在
B.
成键轨道沿键轴重叠,重叠程度大
C.
成键的两个原子不能沿键轴自由旋转
D.
成键的两个原子可沿键轴自由旋转
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参考答案:
举一反三
【单选题】M: Do you think that you can have these shirts finished by Friday morning? W: I' m sorry. I couldn’t possibly get them done by then. Saturday afternoon would be the earliest when you could have them. ...
A.
Friday morning.
B.
Friday afternoon.
C.
Saturday afternoon.
D.
By Saturday afternoon.
【单选题】The bus got stuck in the traffic jam and I couldn’t possibly the early morning class at 8:00.
A.
make for
B.
make up
C.
make
D.
making
【单选题】_______his address, I couldn’t possibly pay a visit to him.
A.
Not knowing
B.
Being Known
C.
Known
D.
Having known
【单选题】I think it may be the ____ light in the workshop. We couldn’t possibly get a clear view of the details of the product no matter how hard we tried.
A.
dim
B.
sound
C.
indifferent
D.
quiet
【单选题】在表格对话框中,__________用于设置表格边框的宽度,以像素为单位
A.
边框
B.
边框粗细
C.
边框大小
D.
边框宽度
【简答题】A.reap the benefits of, B.remind...of , C.get by , D.make the most of E. open the door to , F. in advance, G.turn into , H. stand a chance of , I.all at once, J.over time His sister...
【简答题】BorderStyle 用于设置表单边框的样式,默认值为____。
【简答题】__________ 用于设置表单边框的样式。
【多选题】市场失灵的原因是( )。
A.
市场的外部性
B.
企业垄断
C.
企业补贴
D.
公共物品
E.
信息不对称
【单选题】I couldn’t possibly ________ on $300 a month with everything so expensive.
A.
get through
B.
go through
C.
go  by
D.
get by
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