梁格是用来支承面板主要()。一般由主梁、次梁(水平次梁、垂直次梁、顶梁和底梁)组成,梁格有简式、普通式和复式三种形式。
A.支撑结构
B.受力结构
C.构件
D.支承部件
参考答案:B
句型转换.
1. They broke off their marriage two years ago.
They two years ago.
2. We can't separate science from ethical questions.
Science can't be ethical questions.
Word中,文章标题的对齐方式一般是()
A.两端对齐
B.居中
C.右对齐
D.分散对齐