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【简答题】
已知下列反应Cu(OH)2(s)+2OH-=Cu(OH)42-的平衡常数Kθ=10-3，在1L NaOH溶液中，若欲使0．01mol Cu(OH)2溶解，则NaOH的浓度至少应为多少?
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皮皮学刷刷变学霸
举一反三
【简答题】ceil(16/5)的结果是____。
【单选题】当两船在能见度不良的水域中相互看见时，应：
A.
中断鸣放 “能见度不良时使用的声号”
B.
如采取避让行动，应停止雾号的鸣放，而按章鸣放 “互见中的行动声号”
C.
继续鸣放雾号的同时，如采取避让行动，则应正确地鸣放 “互见中的行动声号”
D.
不应鸣放任何声号，而显示 “操纵信号灯” 表明行动意图
【单选题】Situation: An American woman received a letter from a recently married Japanese friend. The Japanese woman wrote in her letter, “My husband is not very handsome. Your husband is much more handsome tha...
A.
The Japanese woman was trying to tell her American friend that she did not like her husband very much.
B.
It is uncommon in Japan to compliment one's husband.
C.
The Japanese woman didn’t think her husband was handsome, but she liked his personality.
【单选题】在酸碱滴定操作中,盛放标准液的滴定管应该用( )
A.
用自来水洗
B.
用自来水洗后用蒸馏水洗2～3次
C.
用蒸馏水洗后用标准液洗2～3次
D.
用蒸馏水洗后用待测液洗2～3次
【单选题】A woman was at the cinema, and she was enjoying the film very much, but there was a man in the next seat, and he began looking on the floor under him. The woman was angry and whispered, 'What are you ...
A.
True
B.
False
【单选题】当两船在能见度不良的水域中相互看见时,应:
A.
中断鸣放“能见度不良时使用的声号”
B.
如釆取避让行动,应停止雾号的鸣放,而按章鸣放“互见中的行动声号”
C.
继续鸣放雾号
D.
不应鸣放任何声号,而显示“操纵信号灯”表明行动意国
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