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问题 单项选择题

稀释与接种法测定水中BOD5时，下列废水中应进行接种的是：（）

A．有机物含量较多的废水

B．较清洁的河水

C．不含或含少量微生物的工业废水

D．生活污水

答案

参考答案：C

改错题

Dear Dick,

How nice to hear you again. You want to know that is going on in schools in China? In short, thing have begun to improve from schools were called on to reduce learning load. I don’t know about others, but I used to have to work even at weekends doing endlessly homework and attending classes as well as. Now I have more free time. I can follow your own interests such as reading books, visit museums, and taking computer lessons. In the evening I could watch news on TV or read newspapers. What’s more, I can go to bed earlier. As far as I know, everyone is happy about this new arrange of things.

Best wishes,

Li Hua （words: 121）
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