“一个超级大国垮了，另一个超级大国被削弱”是20世纪80年代末90年初国际形势的真实写照，这个“垮了”的“超级大国”是( )

阅读上面短文，然后判断句子正( A )误( B)。
     A man saw a boy standing beside a lake with a mirror (镜子).“Excuse me,” he said, “but could you tell me what you're doing?”
   “I'm fishing.”
   “With a mirror? Could you tell me how it works?”the man asked.
   “OK, but I want five dollars.”
     The man wanted to know the secret very much, so he handed the boy the money.“Now show me how it works,” he said. “Well”, the boy began, “you hold (拿) the mirror towards the water, and when a fish goes by, the sunlight in the mirror gives him a surprise. He stops and doesn't know what to do, and then you catch him at once. ”The man was surprised, “Can you really catch fish with the mirror? How many did you catch?”
   “You're the fifth today!” replied the boy.

读下面的句子，回答问题。

    进入天山，戈壁滩上的炎暑被远远地抛在后边，迎面送来的雪山寒气，会使你感到像秋天似的凉爽。

    再往里走，天山显得越来越美。

    走进天山深处，山色逐渐变得柔嫩，山形也逐渐变得柔美。

这三个句子在文中起了什么作用？

“一条大河波浪宽，风吹稻花香两岸……”歌词中优美的南国风景与下列哪项相吻合（    ）

在上图方框中填出战国七雄的名称。