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【判断题】
喷墨打印机的打印成本最高( )A.
正确
B.
错误
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举一反三
【单选题】It is good news to us that we are invited to such a great concert, _____? [ ]
A.
is it
B.
isn't it
C.
are we
D.
aren't we
【单选题】关于压杆稳定的说法,错误的是( )。
A.
弹性模量大有助于杆件稳定
B.
压杆的截面大则不易失稳
C.
压杆的长度大则不易失稳
D.
两端固定的与两端铰接的,后者易失稳
【简答题】The news____________ to the Great Wall during the summer holidays made us very happy. A.what we would go B.how we would go C.that we would go D.where we would go
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