——Look! What's on the ground? —— Oh, it's my sweater. Please .
A:pick it up
B:put it on
C:give it out
D:take it off
____
选出适当的短语,完成对话。
three plates have lunch live in some carrots many computers
物质
甲
乙
丙
丁
反应前质量/g
20
m
8
6
反应后质量/g
4
待测
28
2