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【单选题】
国家标准中规定标题栏正常情况下在图纸的 ( )A.
左上角
B.
右上角
C.
D.
右下角
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反馈参考答案：
举一反三
【简答题】—Does he tell you if he _____ tomorrow? —No, he doesn't. But if he _____ , I'll call you up. [ ] A. will come; will come B. comes; comes C. will come; comes D. comes; will comes
【单选题】Why hasn’t he come?________ on time, we would have to put off the trip.
A.
If he doesn’t come
B.
If he will not come
C.
If he didn’t come
D.
If he wouldn’t come
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