①____ What's your friend's name? A.Yes, she is.
②____ Does she have long hair? B.Yes, they are.
③____ Are they good friends? C.He's short.
④____ Is your brother tall or short? D.Yes, she does.
⑤____ Is she thin? E.Liu Tong.
谈谈《过零丁洋》颈联的“惶恐”“零丁”的双层含义。
下列关于人类探索生物科学奥秘历程的相关叙述,正确的是( )
如图所示,为了验证“阿基米德原理”,某同学做了如下实验: