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【单选题】
下列配离子中,中心原子配位数不为6的是:A.
中心原子采取d2sp3杂化的配离子
B.
中心原子采取dsp2杂化的配离子
C.
空间构型为八面体的配离子
D.
[CoCl2(en)2]+
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反馈参考答案：
举一反三
【简答题】古代文献记载的玉匣是（）.
【单选题】Staying in a hotel costs ______ renting a room in a dormitory for a week．
A.
twice than
B.
twice as much as
C.
as much twice as
D.
as much twice
【单选题】-How often does your daughter watch TV? - __________. [ ]
A.
once time a week.
B.
Twice a week.
C.
Twice times a week
D.
Third time a week.
【单选题】— How often do you go swimming? — ______. [ ]
A.
Twice
B.
Twice a week
C.
A week
D.
Two weeks
【简答题】上下颌牙槽嵴将整个口腔分为外部的 以及内部的 。
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