回顾中国近代历史，呈现出一种“弱国无外交”的局面。新中国成立后，独立自主的走向国际舞台，国际地位显著提高。根据所学历史知识，回答下列问题。

肉毒杆菌是一种致命病菌，在繁殖过程中分泌毒素．军事上常将这种毒素用于生化武器．人们食入和吸收这种毒素后，神经系统将遭到破坏．该毒素是由两个亚单位（每个亚单位为一条肽链盘曲折叠而成）组成的一种生物大分子．如图是肉毒类毒素的局部结构式，下列说法正确的是（　　）

    It is Sunday today. Anna goes shopping with her mother. She wants her mother to buy a new coat for her. In Hongxing Shop, she finds a green coat. She tries it on. It's too small. She wants a big one, but the big one is not green. Anna doesn't like other colors.” Let's go to another(另外的)  shop to have a look.”her mother says. Then they go to Jiajiale Shop. The shop is big and they see many kinds of coats in different colors and sizes(尺码). Anna tries on a green one. It looks nice on her. So they take it for forty-five yuan.