在豌豆开花以前，用纸袋套住花蕊，不让它接受外来的花粉，最终也能产生种子，原因是（　　）

阅读下面的材料，根据要求写一篇不少于800字的文章。

    某个生物专家到印第安人所在地进行科学考察，雇几个印第安人做向导。前三天，向导走得很快，专家很高兴。但到了第四天，向导不走了，原地休息。专家很奇怪，也很着急。他问向导，这是怎么回事。向导说，我们这里的风俗就是这样的，走三天，休息一天。专家问为什么，向导说，这是为了让我们的灵魂追上我们疲惫的身体。

    要求：选好角度，确定立意，明确文体，自拟题目；不要套作，不得抄袭。

下列传统民居中，位于漳州的是（         ）

Do you have any foreign friends? Do you know their characteristics(特征)?
The Germans are very quiet and they always keep calm. They don't like to speak more words. They look very serious. They like different kinds of amusements. The Germans are very hard—working. They like tidiness, especially the women, who always keep their home clean.
In some ways, the Englishmen look the same as the Germans. They are very quiet and never talk too much with the strangers. They are really polite, so we often hear they say "Thank you."Or "Sorry."The gentlemen are also the Englishmen.
The French's holidays are very long. They like traveling and usually spend their long time staying in other countries. The Frenchmen are more outgoing than the Germans. It is very easy to make friends with them.
Compared to the Frenchmen, the Americans are more outgoing. And they are even opener than all of the Europeans. They don't like to depend on others. So it is very common that the students do part-time jobs in their free time. And in Americans' eyes, success is an important part in their life.