As I was finishing the seventh grade, my school met some financial(财务的) problems. The school made the classes bigger, so there would be fewer    小题1:   (教师).

Sadly, I found out that    小题2:   (无一人) of my close friends were in any of my new classes. Also, my new classmates were quite different f 小题3:    my old ones. I began to feel lonely.

Soon I got to    小题4:   (知道) that people in other groups made new friends in their new classes. They    小题5:   (似乎) very happy with their new friends.

I thought that i 小题6:    was time for me to make new friends. I noticed that people with many friends were very    小题7:   (积极的). They often talked to others first, while I was t 小题8:    frightened to talk to others and hoped other people would talk to me first.

So I decided to c 小题9:  . Once I realized that, I found that making friends is very easy i 小题10:    you can respect(尊重) others and talk to them first. Now I feel a lot happier because I have more friends.

制印刷电路时常用氯化铁溶液作为“腐蚀液”。铜被氯化铁溶液腐蚀的方程式为

2FeCl₃+Cu=2FeCl₂+CuCl₂；FeCl₃溶液也能与铁反应2FeCl₃+Fe=3FeCl₂；当向盛有氯化铁溶液的烧杯中同时加入铁粉和铜粉，反应结束后，烧杯底部不可能出现的是[ ]

A．有铜无铁

B．有铁无铜

C．有铁有铜

D．无铁无铜