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【判断题】
徽州教育的发达是徽州文化形成的原动力,是徽州文化发展的“酵母”。()
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】Which of the following substance is not Brønsted acid ?
A.
H 3 O +
B.
NH 4 +
C.
NH 2 -
D.
HBr
【单选题】'You are not here to tell me what to do. You are here to tell me why I have done what I have already decided to do,' Montagu Norman, the Bank of England's longest serving governor (1920-1944), is repu...
A.
record
B.
new-letter
C.
announcement
D.
motive
【单选题】电解质溶液中离子迁移数与离子电迁移率成正比,当温度与溶液浓度一定时,离子电迁移率是一定的,则25°C时,0.1mol.dm -3 NaOH中Na + 的迁移数t 1 与0.1mol.dm -3 NaCl溶液中Na + 的迁移数t 2 ,两者之间的关系为:
A.
t 1 =t 2
B.
t 1 >t 2
C.
t 1 2
D.
无法比较
【简答题】在外电场存在下,0.05mol•kg -1 的LiCl溶液,Cl - 的离子迁移数为0.82,则Li + 的离子迁移数t(Li + )=()。
【单选题】电解质溶液中离子迁移数 t i 与离子电迁移率 u i 成正比。当温度与溶液浓度一定时,电迁移率是一定的,则 25 °C 时, 0.1 mol·dm -3 NaOH 中 Na+ 的迁移数 t1 与 0.1mol·dm -3 NaCl 溶液中 Na+ 的迁移数 t2 ,两者之间的关系为:
A.
相等
B.
t1> t2
C.
t1< t2
D.
大小无法比较
【简答题】tell me why?
【简答题】布朗斯特(Brönsted)酸、碱和路易斯(Lewis)酸、碱的定义是什么?
【单选题】'You are not here to tell me what to do. You are here to tell me why I have done what I have already decided to do', Montagu Norman, the Bank of England's longest-serving governor (1920—1944), is repu...
A.
record
B.
new-letter
C.
announcement
D.
motive
【判断题】A Brønsted acid is a proton acceptor.
A.
正确
B.
错误
【单选题】Can you tell me why yesterday?
A.
he didn't come
B.
he no come
C.
did he come
D.
didn't he come
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