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【单选题】
大批大量生产尺寸精度为 IT 7 ~ IT9 ,表面粗糙度为 Ra0.1 ~ 1.6 μ m 的,应选择的加工方案为( )A.
粗铣
B.
粗刨
C.
粗磨
D.
钻 → 扩 → 拉
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举一反三
【简答题】Do you often talk with your parents? Here is some advice on how to talk with them. Try to start your talk with something fun. This will make talking easier. For example,, ask them questions about thei...
【简答题】马克思认为,在人类社会中生成的自然界,才是人的现实的自然界,是真正的、人本学的自然界。这个意义上的自然界是指______(人化自然/ 人工自然)。自然界在人类的实践中,既可以成为人认识、反映的对象,也可以成为人改造、加工的对象,那些尚未被改造但已经被认识的自然,称为_______(天然自然/自在自然)。人类对自然的改造,其深入程度也是不同的,比如转基因动植物,属于__________(人工控制的自...
【单选题】Don't your friends in class, or your teacher will be angry. [ ]
A.
say
B.
speak
C.
talk to
【简答题】阅读理解。 Here are some tips (提议) on how to talk with your parents. 1. Try to start your talk with something funny. This will make talking easier, for example, ask your parents questions about their day. ...
【简答题】Do you often talk with your parents? Here is some advice on how to talk with them. Try to start your talk with something fun. This will make talking easier. For example, ask them questions about their...
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