游泳后从河里上来，风一吹更感凉爽，这是为什么？晒粮食时，为了_爱下问搜题

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问题问答题

游泳后从河里上来，风一吹更感凉爽，这是为什么？晒粮食时，为了使粮食干得快，要把粮食放在向阳的地方并且摊开，又是为什么？

答案

夏天游泳后，从水中上岸的人觉得冷，特别是有风吹过来的时候会觉得十分凉爽，这是因为人从水中上岸后，身上有水，有风的时候，就加快了空气流动速度，加快了蒸发，又因为蒸发是吸热的，所以会觉得十分凉爽；同理据影响蒸发快慢的因素可知，即将粮食放在向阳的地方，可以提高液体的温度，将粮食摊开，可以增大液体的表面积，这样都加快了粮食内水分的蒸发，使得粮食干的更快一些．

阅读理解

阅读短文，判断正(T)误(F)。

There are many countries in the world, but my favourite country is China,

becauseI'm Chinese. I love my country. China is one of the biggest countries in the world. On the map, China looks like acock. The capital city of China is Beijing. Beijing has many stores, restaurants and ho-tels. China's flag is

red. It has five yellow stars. One is big, and the other four are small. In

China, we speak Chinese. There are a lot of famous places in China.

Tian'anmen Square and the Palace Museum are very famous. There are many animals inChina! too. Pandas are very famous. Long time ago, they lived

only in China.

( ) 1. Beijing is the capital city of our country.

( ) 2. I'm Chinese.

( ) 3. China is a big country in the world.

( ) 4. There are five red stars in China's flag.

( ) 5. Pandas live in some countries now.

( ) 6. I love China.

填空题

1636年内蒙古（）旗王公聚会多伦诺尔，承认皇太极为蒙古汗。