“梦里走了千万里,醒来还是在床上”这句诗告诉我们( )
A:梦想都能成为现实
B:没有行动,理想只能是空想
C:梦想是青少年时期最重要的生命主题
D:现实之中不可能包含理想
-- Li Ming said he would come here, _______ he hasn't arrived.
-- Don't worry. He is on the way. ______, there is much traffic, so it will take more time.
一个简单的摆由什么组成?
地形以平原为主的大洲是( )