Mo/10、Mo/5、Mo/2,主要用于表示缝隙、构造节点、构配件断面尺寸等。( )
参考答案:对
论述杂交棉在我区的优势。
—What’s your mother__________ now?
—She’s __________ our house.
A.doing, clean
B.do; clean
C.does; cleans
D.doing; cleaning