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【单选题】
测定药材的酸不溶性灰分即灰分中不能溶于()A.
10%盐酸的灰分
B.
15%的灰分
C.
20%盐酸的灰分
D.
25%盐酸的灰分
E.
30%盐酸的灰分
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【单选题】What aspect of wind power is the lecture mainly about?
A.
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B.
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C.
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D.
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A.
Wind was very expensive in the 90's.
B.
The turbines built in the 70's were fragile.
C.
Wind power still cannot compete with fossil fuels.
D.
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【简答题】阿斯顿阿斯顿
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A.
John and Lisa are team members.
B.
John and Lisa are good at handling emergencies.
C.
John and Lisa are good at routine work.
D.
John and Lisa are good partners when working together.
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