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【Production Version】Daily Question 20171031

2017-11-01View Original

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Temporary construction openings should be left in the wall; the distance between their sides and the wall at the junction point should be no less than ( ) mm, and the net width of such openings should not exceed ( ) m. A. 500, 2 B. 500, 1 C. 1000, 2 D. 1000, 1

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