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【单选题】
在氯化物检查法中,最适宜的酸度为A.
5ml硝酸/50ml
B.
5ml盐酸/50ml
C.
10ml稀硝酸/50ml
D.
10ml硝酸/50ml
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【简答题】滚动轴承钢进行球化退火的目的是______，______。
【简答题】轴承钢球化退火的目的是什么？
【简答题】Every year, our school has a dance for all the students. It's a little funny seeing friends in clean shoes and trousers or colorful 1 , instead of the usual school uniform. Most of us think the dance ...
【单选题】---Has Tom finished his job yet? ---I have no idea of it; he _____ it this morning.
A.
has been doing
B.
had been doing
C.
did
D.
was doing
【简答题】选词填空 in order to , turn up , back out , get ... across ,have a preference for be similar to 1 . Jack agreed to get here at seven, but it has been seven twenty. He hasn't ______ 2 . He explained the ...
【简答题】阅读理解。 For Chinese students the end of their senior year is filled with studying and stress as they prepare for the college entrance exams in June. But for American high school seniors the experience c...
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