It's cold (冷) today. Please .
A:open the door
B:close the window
C:open the window
D:1ook at the window
乘法和除法,叫做第几级运算?
当人在草丛中行走时,裤角上常被沾上一些鬼针草带刺的“针”,人在这一过程中所起的作用是( )
填空题