题干
If you see any litter on the school playground, you'd better _______.
A：give it away
B：pick it up
C：turn it off
D：put it on
答案(点此获取答案解析）
B
If you see any litter on the school playground, you'd better _______.
A：give it away
B：pick it up
C：turn it off
D：put it on
和
的图象在
内的所有交点中，能确定的不同直线的条数是 （ ）
要5元，李老师带150元一共能买（ ）个