李华为啥不写作文【一】
Dear editor,
I am Li Hua from Nanjing No.1 middle school. Recently I have met some problems and I want to ask you for some advice.
I find it hard for me to speak standard Chinese well, which makes it diffucult for me to communicate with other people around me. Therefore, I often feel lonely and sad. I don't know who I can turn to for help. I want to change the situation.
Can you help me ? Hope to hear from you soon.
Yours
Li Hua
李华为啥不写作文【二】
Dear Mike,
You asked me about the present situation of the public transportation in Wuhan in the last letter.
Now, I will communicate the action of the government and my opinion with you.
Firstly, the price of the bus has been cut down, which is very important, I think. Encouraging people to take bus can solve the biggest problem--too much people.
Another way is to develop the bike rental. As we know, car is much bigger than the bike obviously. Driving a car takes up much more place than cycling. So, developing the bike rental is an absolutely correct way to prove traffic circumstances.
Besides, government also builds 4 subway lines under the central of the city and increases the number of the taxis.
In my opinion, all the action above is useful. When the actions above are all finished, the city will be more perfect.
Yours,
Li hua
李华为啥不写作文【三】
水箱里的水为啥溢出来了？
去年冬天的一天，中午放学回家后，我听见二楼哗哗地响个不停，我立即跑上去一看，原来是我家暖气溢水箱里的水溢出来了，水箱里面还不停地往外冒着水蒸气。这可把我吓坏了，我马上跑到一楼，焦急地对爸爸说：“爸爸，爸爸，二楼水箱的水溢出来了。”爸爸听了赶忙跑上去，看见水箱里的水已经盛不下了，“突突突”的`往外冒。着急地说：“糟了，我早上忘关暖气炉了。”说完，爸爸急忙跑下二楼，赶到锅炉房，只见炉火通红，暖气烧得嗞嗞作响。爸爸很快把炉封住，又往暖气里面加了点凉水。过了一会儿，水箱里的水才慢慢地下去了。
这就奇怪了！我问爸爸：“这是怎么回事，这怎么能让水箱里的水面降低了呢？”爸爸对我说：“这里面有科学道理。这个科学道理就是热胀冷缩的原理。水加热了以后体积就会膨胀，水冷了以后体积就会缩小。爸爸早上忘关暖气炉了，炉子不停地烧，暖气系统里面的水温就会升得很高，体积增加了，所以水箱里的水就盛不下了，溢了出来。把炉封住以后，暖气系统里面的水温降低了，水的体积减小了，水面就下降了，水就不会溢出来。”
过后，爸爸又拿来了温度计，说：“这里面红色的是液体。我用打火机烧温度计的最底部，这红色的液体就会慢慢地往上升。”说完，爸爸立刻示范给我看，爸爸用打火机烧了一下温度计的最底部，那红色的液体果然上升了。这就是利用热胀冷缩的原理制成的温度计。
听了爸爸的讲解，我觉得我又学到了一点小知识。生活中，有许许多多的物体都有热胀冷缩的特性。生活中，有许许多多奇妙的科学问题等着我们去探索。
