题干
Boys and girls, ________ up your hands if you want to go for a picnic this weekend.
A：putting
B：to put
C：put
D：puts
答案(点此获取答案解析）
C
Boys and girls, ________ up your hands if you want to go for a picnic this weekend.
A：putting
B：to put
C：put
D：puts
，该物质不应有的化学性质是