三角形的三边长a，b，c满足2ab=（a+b）²﹣c²，则此三角形是（　　）

今年5月12日是我国第七个“防灾减灾日”．下列做法不合理的是（　　）

根据句意，用括号中所给单词的适当形式填空。
（1）What ____  you____ (do) this Monday?
            There____  (be) a football match.____  you ____ (go) with us?
（2）I ____ (go) to see you as soon as I get to Beijing.
（3）I think it ____ (be) rainy tomorrow.
（4）My father ____ (send) me a new bike when I am tall enough.
（5）We____  (visit) the Great Wall next week.
（6）Who ____ (give) us a talk on the computer in two days?
（7）They ____  (build) a new modern house near the river next year.
（8）I want to know if he____ (be) back tomorrow.

下列词语中划线的字，每对读音都不相同的一组是（　　　）