题目:
—What do you think of the Eiffel Tower?
—Splendid. When I was in France, I it.
A.have visited
B.had visited
C.could visit
D.visited
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D解析:钢筋的纵向焊接应采用闪光对焊。当缺乏闪光对焊条件时,可采用电弧焊、电渣压力焊、气压焊。