—No, it isn't. _______ is over there under the tree.
A:your; Mine
B:my; Your
C:her; Her
D:mine; Yours
一张21cm×21cm的纸,最多能做( )个底面半径为3cm,高为3cm的圆柱形圆筒.
下列事件和现象,对民族资本主义的产生和发展起促进作用的是①洋务运动 ②太平天国运动 ③辛亥革命 ④实业救国思潮