阅读短文，判断正误。用“正确”或“错误”表示。

Penguins are good swimmers, and they are very good at swimming in the sea. They can dive much deeper than people. Some people can dive about 180 metres, but most people can only dive about 30 metres. Penguins can dive 500 metres. That is a long way down! Do you know the TV Tower in Shanghai? That is 468 metres high.

 Penguins can hold their breath much longer than people.Some people can hold their breath for about five minutes, but most people can only hold their breath for one or two minutes. Penguins can hold their breath for 20 minutes.

Many whales can hold their breath longer than penguins. Some whales can hold their breath for about two hours!

学完《古代中国的政治制度》这一单元后，有四位同学分别撰写研究历史小论文，其中论文标题出现史实错误的是 (    )

阅读诗句，回答问题。

常记溪亭日暮，沉醉不知归路，

兴尽晚回舟，误入藕花深处。

争渡，争渡，惊起一滩鸥鹭。

根据对诗句的理解，写出赏析。

右图佛座侧面刻有“大唐龙朔二年三藏法师玄奘敬造释迦佛像供养”。“三藏法师玄奘”的历史功绩有 (  )

材料

题1：经过某十字路口的汽车，可能直行，也可能向左转或向右转．如果这三种可能性的大小相同，求三辆汽车经过这个十字路口时，至少要两辆车向左转的概率

题2：有两把不同的锁和三把钥匙，其中两把钥匙分别能打开这两把锁（一把钥匙只能开一把锁），第三把钥匙不能打开这两把锁．随机取出一把钥匙开任意一把锁，一次打开锁的概率是多少？

我们可以用“袋中摸球”的试验来模拟题1：在口袋中放三个不同颜色的小球，红球表示直行，绿球表示向左转，黑球表示向右转，三辆汽车经过路口，相当于从三个这样的口袋中各随机摸出一球

问题：