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问题 多项选择题

储粮得失水分的根本原因包括（）。二是粮油、害虫、微生物等生物成分的代谢活动产生的代谢水使水分发生变化。

A、与周围环境进行水分交换

B、害虫的代谢的水分

C、微生物的代谢水分

D、自动分级

答案

参考答案：A, B, C

改错题

This morning I found red wallet on the campus. Girls usual like red, so I believed the wallet was belonged to a girl student. I opened it, try to find out whose it was. Therefore, I found nothing but 300 yuan in it. I was wondering what to do with it while suddenly my classmates Chen Yang passed by. She suggested she put up a Lost and Found notice and I did so. I wrote down my telephone number and ask the owner to call me after she saw it. Later, a girl came to claim it on 3 o’clock this afternoon.
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填空题

人们选用水作为汽车发动机的冷却剂，这样做是因为水的______较大．一汽车水箱中装有5kg的水，当温度升高20℃时需要吸收______J的热量．（C水=4.2×103J/（kg•℃）
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