苔藓、蕨类植物区别于种子植物最明显的特征是苔藓、蕨类植物[ ]
A．无根、茎、叶
B．无茎、叶
C．无叶
D．用孢子繁殖后代
答案：D
— Oh, I forgot to bring my umbrella.
— _____ [ ]
A. Never mind.
B. Why don't you use mine?
C. The problem isn't big.
D. Why not bring yours?
周向张力
