下列为体液免疫图解，请分析判断下列说法正确的是 ( )
Look for Volunteers
Toys for Tots
The organization, located in Shanghai, aims to collect old toys, which will be donated to children in need. The work of volunteers is to collect toys, communicate with people who donate toys and give out toys properly.
Contact by telephone 025-54568482 or email toys-forkids@126. com.
Red Cross
The organization, located in Beijing, has a program Red Cross Holiday Mail Heroes. The program is collecting hand written cards to send heroes in the list. Every volunteer needs a pen and a piece of paper.
Contact by telephone 010-341568752 or email redcross-beijing@163.com
Pet Centre
The organization, located in Beijing, is to help people cure their sick pets. Volunteers should be trained before working.
Contact by telephone 010-563428791 or email helping-pet@163. com.
Hope for Blind
The organization, located in Beijing, wants to help people read books. Two kinds of volunteers are needed. One is to read books for the blind, the other who is professional(专业的) will teach the blind Braille.
Contact by telephone 010-568794252 or email blindcen-tre@sina.com.
用所给词的适当形式填空
（1）The boy decided____(be)an actor at the age of 10.
②What’s the name of the tall____(build)?
③Darwin was a____(success)scientist of England.
④ At 25, Lily____(marry)a handsome man.
⑤The girl can speak several____(language).
水是生命之源。认识水资源、合理利用和保护水资源是我们义不容辞的责任。请回答下列问题：
往AgNO3和Cu（NO3）2的混合溶液中加入一定量的铁粉，充分反应后过滤，向滤渣中加入稀盐酸，无气泡产生．根据上述现象，你能得出的结论是（ ）
