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【单选题】
科尔 (Kohlransch) 从实验中总结出电解质溶液的摩尔电导率与其浓度成线性关系 ,这一规律适用于( )A.
弱电解质
B.
强电解质的稀溶液
C.
无限稀溶液
D.
浓度为 1mol·dm -3 的溶液
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【单选题】—Do you often go swimming _______ Sunday mornings? —Yes. Why not _______ with me this Sunday? [ ]
A.
on; go
B.
in; to go
C.
on; going
D.
in going
【单选题】---- Can you tell me why __________? ---- Because I want to help the people there.
A.
do you go to Tibet
B.
did you go to Tibet
C.
you are going to Tibet
【单选题】—Could you Tell me __________? —Because I want to help the people there. [ ]
A.
why do you go to Tibet
B.
why did you go to Tibet
C.
why are you going to Tibet
D.
why you are going to Tibet
【简答题】病毒增殖所需的原料,能量和生物合成的场所均由( )提供。
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