腔肠动物、线形动物和软体动物都是( )
A:哺乳动物
B:两栖动物
C:鱼类
D:无脊椎动物
Kate is very ________. She likes to stay at home and read books.
甲午战争以后,国内出现了兴办近代民族工业的热潮,直接原因是( )