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【简答题】
用 HCl 中和 Na 2 CO 3 溶液至 pH = 10.50 和 pH = 6.00 时,溶液中各有哪些组分?其中主要组分是什么 ? 当中和至 pH < 4.0 时,主要组分是什么?
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皮皮学刷刷变学霸
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【简答题】医疗期是指企业职工因工负伤停止工作，治病休息的期限。(判断题)如果错误，请尽量说明错误之处，谢谢！
【单选题】We can infer from the passage that in England ______.
A.
many plays are not for young people
B.
many young people don’t like theatre
C.
people know little about the plan
D.
children used to receive good arts education
【单选题】It was suggested but not stated that the American West is the place where______.
A.
young people are reluctant to go
B.
people may possibly get wealthy
C.
it is more interesting to settle
D.
the old people's dreams can be realized
【单选题】In the University of Wisconsin-Madison, what's the graduation rate of its blacks in 2007?
A.
81%.
B.
56%.
C.
15%.
D.
25%.
【单选题】根据《企业职工患病或非因工负伤医疗期规定》，医疗期是指企业职工因患病或非因工负伤停止工作治病休息不得解除()的时限。
A.
劳动关系
B.
劳动合同
C.
工作合同
D.
雇佣关系
【单选题】What is Parker's attitude to university in the future?
A.
Virtual global education system will replace university in the future.
B.
University will continue to play a key role in the future.
C.
Residential campus will be integrated into the virtual educational system.
D.
Universities should open their doors to every member in a society.
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