阅读理解
Friendship between animals sometimes seems stronger than that between men.
In France, a man had to move to a new job two hundred kilometers away. He had a dog and a cat, and he loved them both. But he thought that the cat would like to stay in the same house with new owners. So he moved and took only the dog.
About three weeks later, the dog was suddenly lost. For several days, the man looked for his dog, but didn't find him. Then, seven weeks later, the dog came back but he was not alone. By his side was the cat. They were tired and hungry after their long trip. And they never left each other again.
Another story is about goldfish. We usually think fish are cold-hearted, but sometimes we may be wrong. A friend had to work in another country. So I took her pet goldfish and put it in a bowl with mine. They two lived together for six months. When the friend came back, she took her fish home.
Then, I found my goldfish was acting strangely, hitting against the side of the bowl. The next morning he died. Later that day, my friend phoned to say that her goldfish was also dead. I believe they died of sadness.
为
直流电源，
为浸透饱和氯化钠溶液和酚酞试液的滤纸，
为电镀槽．接通电路后发现
后，使c、d两点短路．
