A:18°
B:26°
C:36°
D:72°
一个圆柱,底面半径为r,高是2πr.这个圆柱的侧面展开图是一个正方形.
He ____(猛烈地,激烈地) criticized self-styled educational experts for
ignoring Shakespeare.
I'm pleased to hear that Tom won the championship yesterday. ______,I dreamed that he became a dark horse the night before.
在适宜萌发的环境中,一粒种子能够长成一株完整的植物体,主要是由于( )