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【多选题】
下列关于配合物分子轨道理论的说法,正确的是:A.
中心配体之间是共价作用
B.
能够圆满解释化学光谱序列
C.
能够从理论上解释强场配体和弱场配体的分裂能变化
D.
配合物的稳定性取决于配体的孤对电子进入成键分子轨道，相当于形成配位键
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举一反三
【简答题】I am heartily grateful to your help．
【简答题】I can't thank you much for your kindness，because without your help I can’t have succeeded in the exam．
【简答题】_____for your help．
【单选题】How did Taylor do when she wrote her own name?
A.
She did quite well with first two letters.
B.
She couldn't write even one letter.
C.
She lost interest in the game from the very beginning.
D.
She wrote her name on the author's arm.
【简答题】Become a volunteer and help those who need your help in your community ( 社区 )！ Volunteer work includes helping the poor, helping the families whose houses were destroyed by natural disasters ( 灾害 ) or...
【简答题】阅读理解。 Become a volunteer and help those who need your help in your community! Volunteer work includes helping the poor, helping the families whose houses weredestroyed by national disasters or creatin...
【单选题】患者女, 59岁。有风湿病7年,近1年反复出现劳动后呼吸困难。 2天前上楼时突然出现心前区疼痛、黑曚,患者最可能并发了
A.
二尖瓣狭窄
B.
二尖瓣关闭不全
C.
主动脉瓣狭窄
D.
充血性心力衰竭
E.
主动脉瓣关闭不全
【单选题】Thank you for your help. ______ for your help, I wouldn’t have succeeded in my experiment.A．If i
A.
39. Thank you for your help. ______ for your help, I wouldn’t have succeeded in my experiment. A．If it is not
B.
Were it not
C.
Had it not been
D.
If they were not
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