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【单选题】
受冲击载荷作用的齿轮用( )。
A.
KTZ550-04钢
B.
GCr15钢
C.
Cr12MoV钢
D.
20CrMnTi钢
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【单选题】As you are students of English, it's very possible that you'll be interested in England. That's where the language was first spoken. But England is often called by other names. This often confuses peo...
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【单选题】It's possible for you to save costs if you send your two children to the same school.
A.
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B.
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【单选题】You'd better leave , because it's dangerous here. [     ]
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D.
Ireland
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as possible as you can
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