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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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参考答案:
举一反三
【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?
【单选题】新石器时代已出现外伤科名医( )
A.
神农
B.
俞跗
C.
伏羲
D.
黄帝
【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】农历哪个月份被称作恶月?
A.
十二月
B.
七月
C.
六月
D.
五月
【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...
【单选题】液化石油气瓶在充装时,必须留出 的气化空间
A.
10%~15%
B.
15%~20%
C.
20%~25%
D.
25%~30%
【单选题】高碳钢球化退火的目的是( )。
A.
消除应力
B.
降低硬度提高切削加工性能;为淬火做组织准备
C.
消除成分偏析
D.
提高塑性和韧性
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