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【单选题】
一斜导柱抽芯机构,斜导柱与开模方向成ɑ角,滑块运动方向与开模方向垂直,抽芯距为S时斜导柱的有效工作长度应为( )。A.
S/Sinɑ
B.
Stgɑ
C.
S/cosɑ
D.
Sctgɑ
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举一反三
【单选题】---What major will you choose when you are at university? ---____ but English, which has brought terrible dreams to me for the past 12 years.
A.
Anything
B.
Nothing
C.
Something
D.
Everything
【判断题】压缩因子Z>1表明该气体易压缩,Z<1表明该气体难压缩。< /div>
A.
正确
B.
错误
【简答题】Suppose you are going to study abroad but hesitating about the major. Write an email to your foreign friend Bob in America to 1)tell him about your intention to study abroad, and 2)ask for advice abou...