生物多样性不包括( )
A:遗传多样性
B:物种多样性
C:生态环境多样性
D:生态系统多样性
Many students know what they want to be in the future* . We think boys are different from girls. Here is a survey in Green High School. Let's look at the diagram* .
《过零丁洋》的颔联运用了什么修辞手法?有什么表达效果?上下句有何联系?