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【单选题】
在水溶液中不能存在的离子是A.
[ Ti(H2O)6 ]3+
B.
[ Ti(H2O)6 ]4+
C.
[ Ti(OH)2(H2O)4 ]2+
D.
[ Ti(O2)OH(H2O)4 ]+
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举一反三
【单选题】The answer this question is known ________ us all.
A.
to by
B.
of to
C.
of of
D.
to to
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【单选题】A: You have no difficulty finding the answer to the question? B: _____
A.
None at all.
B.
Not at all.
C.
No problem.
D.
Neither.
【简答题】please ______ your hand if you have any question at all. A: raise B; rise C; arise
【单选题】Gorge and the rest entreated me by all means not to let the question drop, but to ______ in the investigation.
A.
proceed
B.
precede
C.
succeed
D.
recede
【多选题】在发生 ( )情况时,电力设施产权人可以先采取紧急措施,防止危害电力设施安全的事故发生或者最大限度减轻事故危害,并及时报告电力行政管理部门,告知相关利害关系人。
A.
自然灾害
B.
设备故障
C.
突发事件可能危及电力设施安全的
D.
重大庆典活动需要保证供电的
【简答题】呼吸衰竭患者氧疗的原则和氧疗有效的指标。
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