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
______ is his only favorite hobby.[ ]
A. Play basketball
B. Playing basketball
C. Play the basketball
D. Plays basketball
什么是灰的循环倍率?