皮皮学，免费搜题
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【单选题】
实验室中常用的铬酸洗液是由哪两种物质配制的()
A.
铬酸钾和浓硫酸
B.
铬酸钾和浓盐酸
C.
重铬酸钾和浓盐酸
D.
重铬酸钾和浓硫酸
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【单选题】It’s too bad that I failed in the math exam. If only I ___________________ hard at it! A. worked B. had worked C. has worked D. would work
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Because he was still worried.
B.
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【单选题】Why not ( )at the back door?
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【单选题】Why is the dark part of the moon not completely black?
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【简答题】I had always _____________ upon the children that if they worked hard they would succeed in life. The children's future is always _____________ in my mind. The author wrote three thank-you letters to ...
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B.
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C.
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D.
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【单选题】Why was the woman anxious to go back home?
A.
Her kids will arrive home after school.
B.
She is too exhausted to work.
C.
She has finished her work.
D.
The man does not ask her to go back to the office.
查看完整题目与答案
【单选题】Why is the dark part of the moon not completely black?
A.
The earth throws back sunlight on to the moon.
B.
The sun shines on the moon's surface.
C.
The moon throws back the light from the sun.
D.
The moon has light of its own.
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