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【单选题】
关于杂化轨道的一些说法,正确的是 ( )
A.
CH 4 分子中的 sp 3 杂化轨道是由H原子的1s轨道与C原子的2p轨道混合起来而形成的
B.
sp 3 杂化轨道是由同一原子中ns轨道和3个np轨道混合起来形成的4个 sp 3 杂化轨道
C.
凡是中心原子采取 sp 3 杂化轨道成键的分子,其几何构型都是正四面体
D.
凡 AB 3 型分子的共价化合物,其中心原子A均采用 sp 3 杂化轨道成键
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举一反三
【单选题】on this report, the English government decided to ask Captain James Cook to go and look for this continent.
A.
Having based
B.
Basing
C.
Based
D.
To be based
【单选题】______to comment on the report on Monday, Liu Jianchao said this report was a total rumor.
A.
When asking
B.
When asked
C.
When he asked
D.
When is asked
【简答题】对小球(实例名称为ball)注册鼠标单击事件,要求每单击小球,使小球透明度以0.1递减
【简答题】What does 'cones' refer to in this report?
【单选题】下列哪一项不是黄疸热重于湿证的特点()
A.
身目黄色鲜明
B.
头重身困
C.
腹部胀闷
D.
便黄赤
E.
大便秘结
【单选题】下列哪一项不是黄疸热重于湿证的特点( )
A.
大便秘结
B.
小便黄赤
C.
身目黄色鲜明
D.
头重身困
E.
腹部胀闷
【简答题】This report summed up the new achievements made in our economy, culture and education.
【单选题】______ on this report the English government decided to ask Captain Cook to go and look for this continent.
A.
Having based
B.
Basing
C.
Based
D.
To be based
【单选题】This report examines the social and economic development policies enacted by three countries to ______ a resurgence of terrorism within their jurisdictions.
A.
forbid
B.
prohibit
C.
inhibit
D.
ban
【简答题】E-waste is fast becoming a serious problem around the world. This report will examine this problem and provide some possible ways to solve it. We live in a society that is producing and using electron...
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