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【简答题】
在0.5600g含杂质的碳酸钙里,加入40.00mL 0.1025mol/L盐酸滴定液,滴定过量的盐酸溶液,用去10.20mL的氢氧化钠溶液,1mL氢氧化钠溶液相当于0.96mL盐酸,求碳酸钙的百分含量?(碳酸钙的摩尔质量为100g/mol)
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we should define what is good and what is evil according to different situations.
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A.
appear
B.
develop
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【单选题】Not only_______know the theory, but also_______learn how to apply it in practice.
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B.
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A.
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B.
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【单选题】--We all know that paper is made ________ wood. -- Yes, we can also say that wood can be made ________ paper.
A.
of, from
B.
of, into
C.
from, into
D.
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【单选题】From Socrates’ debate with his students, we know that _____.
A.
good people never cheat others.
B.
none of the above
C.
we should define what is good and what is evil according to different situations.
D.
we should not steal away our friend’s tool when he is committing suicide.
查看完整题目与答案
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A.
B.
C.
D.
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【简答题】阅读理解。 Maybe it is true that we do not know what we have got until we lose it, but it is also true that we do not know what we have been missing until it arrives. It takes an hour to like someone, and ...
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