题干
___of them has a dictionary and ___one of them can look up words in the dictionary
A：Each,every
B：Every ,each
C：Each,each
D：Every,every
答案(点此获取答案解析）
A
___of them has a dictionary and ___one of them can look up words in the dictionary
A：Each,every
B：Every ,each
C：Each,each
D：Every,every
在点
处的切线方程是
，则（ ）