问题
多项选择题
洁净室分类方法很多，按洁净室的使用性质可划分工业洁净室、生物洁净室、生物安全实验室三类。下列属于生物洁净室的有（）。
A．食品
B．生物制药
C．洁净手术部
D．微生物培养
E．实验动物饲养
答案
参考答案：A, B, C, E
解析：生物洁净室如生物制药、食品、实验动物饲养、洁净手术部等。
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洁净室分类方法很多，按洁净室的使用性质可划分工业洁净室、生物洁净室、生物安全实验室三类。下列属于生物洁净室的有（）。
A．食品
B．生物制药
C．洁净手术部
D．微生物培养
E．实验动物饲养
参考答案：A, B, C, E
解析：生物洁净室如生物制药、食品、实验动物饲养、洁净手术部等。
This might seem crazy, because many students in the United States do job being paid! Yes, they volunteer. And they it, too! Many girls volunteer to work in hospitals. Other kids volunteer to work at zoos or dog houses where lost are kept in._ they don't get paid, they get to _ their days with animals. There's also a Big Brother Foundation in the US. Older kids can _ younger kids and them with their homework. Maybe you don't have _ chances in China to volunteer as kids in the US have. So be creative and try to _ _ some ideas! Volunteer to help people in _ _ way you can think of. You can volunteer to help at a hospital, you can help old people, or you can volunteer to clean up trash on the ground. _ _ volunteer? Because it can give you a good _ _.It might help you get a job in the future. Doing volunteer work shows that you care about other__ _ and you are generous with your time. Bosses like people _ _ do these things. Volunteering not only helps you in the future, but also makes you feel _ _ now. Try it! It could be the best improvement to _ _ vacations.
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