單項(xiàng)選擇題后張法預(yù)應(yīng)力筋張拉時(shí),發(fā)生斷裂或滑脫的數(shù)量嚴(yán)禁超過同一截面預(yù)應(yīng)力筋總根數(shù)的()

A.3%
B.4%
C.5%
D.6%