字母式a×6省略乘号后表示为a6.______.
根据题干分析可得:字母式a×6省略乘号后表示为6a,原题说法错误.
故答案为:×.
补全对话。(每空一词,共5分)
A: What bad weather! Another sandstorm begins.
B: So it is. But why are there so many sandstorms recently?
A: Because there is so much sand around us.
B: Why is there so much sand?
A: Because a lot of land has been _小题1:___ into sand.
B: And why?
A: Because people have __小题2:___ down a lot of trees.
B: That may be the root(根源). We should __小题3:__ people from cutting down trees. Although we have built “ the Great Green Wall”, we still need to work hard to __小题4:___ the environment.
A: I agree _小题5:__ you. Let’s go to the hill and plant trees on Sunday.
B:Good idea.
Nearly three fourths of work _____finished by students, the rest of work will ___ off.
A.is; be put
B.is ; put
C.are; put
D.are; be put