A.15
B.20
C.22
D.25
A.15
B.20
C.22
D.25
A.7d
B.14d
C.21d
D.28d
A.0.88
B.0.90
C.0.92
D.0.96
A.7d
B.14d
C.21d
D.28d
A.3
B.7
C.14
D.28
A.3天
B.7天
C.14天
D.28天
A.0℃
B.-2℃
C.5℃
D.10℃
A.养护时间可以少于3天
B.养护时间与环境温度无关
C.养护时间至少应为7天
D.养护时间超过28天没有影响
A.20MPa
B.30MPa
C.40MPa
D.50MPa