通过对生物化石的研究,不能推测的是( )
A:生物进化的趋势
B:生物之间的亲缘关系
C:生物的生存年代
D:无机物能形成有机物
补全对话
从方框中选择最佳选项完成对话, 有两项多余
A. Oh, I see.
B. They’re buying food and vegetables.
C. We’re having a good time.
D. some people aren’t shopping
E. Why are some of them going away in a hurry?
F. Thank you.
G. They are choosing and talking.
A: Look! There are many people in the shop. What are they doing?
B: ____
A: Yes, but____ in the shop. What are they doing in the shop?
B:____
A:____
B: Because they are leaving for home.
三江源指长江、黄河、澜沧江的源区,被誉为“中华水塔”。读三江源示意图,完成以下问题。