下列哪几项是按承重构件划分的建筑物结构类型（）。
A.钢结构
B.钢筋混凝土结构
C.塑料结构
D.砖木结构
E.网状结构
参考答案：A, B, D
–Would you like me to make these calls for you?
–_______. I should have made them a while ago, but I have been at meeting all day.
A．I’d really appreciate it.
B．Thanks. I can manage it.
C．It’s a piece of cake.
D．Take it easy, please.
地磁场转向年代表
