单项选择题
A.恒载+活载+风载 B.恒载+0.85活载+风载 C.恒载+0.85(活载+风载)
A.恒载+活载 B.恒载+风载 C.恒载+活载+风载
A.0.6~0.7 B.0.7~0.8 C.0.8~0.9