竹节虫静止于树上时像一段树枝，这是竹节虫对其生活环境的一种适应。

    In England, people often talk about the weather because they can experience four seasons in one day. In the morning the weather is warm just like in spring. An hour later black clouds come and then it rains hard. The weather gets a little cold. In the late afternoon the sky will be sunny, the sun will begin to shine, and it will be summer at this time of a day.

    In England, people can also have summer in winter, or have winter in summer. So in winter they can swim sometimes, and in summer sometimes they should take warm clothes.

    When you go to England, you will see that some English people usually take an umbrella (伞)or a raincoat with them in the sunny morning, but you should not laugh at them.

    If you don't take an umbrella or a raincoat, you will regret later in the day.

如图为生物圈中碳﹣﹣氧循环示意简图，请据图回答：