框架结构模板的拆除顺序一般是( )。
A.梁底模→梁侧模→楼板→柱
B.柱→楼板→梁侧模→粱底模
C.柱→梁侧模→梁底模→楼板
D.楼板→柱→梁侧模→梁底模
参考答案:B
三相正弦电动势有哪些特点?
Tom has an English story ______, he wants ______ another one. [ ]
A. book; book
B. book; to book
C. books; to book
D. book; booking