could, speak, all, she, not, at, (.)(连词成句)

____

读短文，将人物和图片连线。

    My name is Yaoyao. I'm in Sydney. It's very hot. I wear a beautiful dress. Mike is going to Beijing next week. It's winter in Beijing now. He should wear gloves. Bill is in the USA. He should wear trousers. Joy is in her room. It's very warm. She wear a shirt. Binbin is playing football now. He is wearing socks.

① ____   A.

② ____   B.

③ ____   C.

④ ____   D.

⑤ ____   E.

1）比较a²+b²与2（2a﹣b）﹣5的大小．

（2）已知求证：$a^a{b}^b\ge {\left(ab\right)}^{\frac{a+b}{2}}$当且仅当a=b时等号成立．

下表选项中，材料与结论之间逻辑关系正确的是(　　)