⑴What's this? ____                 A. He's my brother.

⑵How are you? ____              B. It's a pig.

⑶Who is he? ____                  C. Yes，I'm tall.

⑷Where is she? ____             D. I'm fine，thank you.

⑸Are you tall? ____               E. She's in the classroom.

⑹What can you do? ____      F. I can read.

20世纪50年代，中国农村流传着一首歌谣：天上多少星，小孩数不清；全民盖土炉，神仙数不清。材料所述现象产生的影响是

如图是元素周期表的一部分．表中所列的字母分别代表一种化学元素．

试回答下列问题：