问题
填空题
根据图画提供的信息完成句子。
1. We can find out the weather in this_______
.
2. I want to buy a ____
.
3. You can look up a new word in a ____
.
4. There are lots of books in the ____
.
5. You can get information about the ___
___ 
.
答案
1. newspaper 2. CD-ROM 3. dictionary 4. library 5. weather, TV
，若AB=BA，则k=（）。