單項(xiàng)選擇題支架搭設(shè)應(yīng)采用分階段分級(jí)預(yù)壓,根據(jù)規(guī)范要求,盤扣式腳手架采用()

A.60%,80%,120%
B.50%,80%,100%
C.30%,60%,100%
D.30%,60%,120%


您可能感興趣的試卷