下列有关病毒的叙述中，错误的是 (    )

32．He was very busy, and________he didn’t go to the party that night.

阅读短文，下列问题
A
    One night there was a heavy snowstorm(暴风雪), and in the morning Mr. Smith's garden was full of snow. Mr. Smith wanted to take his car out, so he asked a man to clean the road from his garage to his gate, he said to the man,"Don't throw any snow on that side, because it will damage (破坏) the shrubs in my garden and don't throw any on the other side, because it will break my fence; and don't throw any into the street, or the police will not be pleased. "Then Mr. Smith went out.
    When he came back, the road was clean and there was no snow on the shrubs, or the street. Mr. Smith was pleased until he opened the garage to get his car out. There was full of snow from the road, and his car was somewhere under it all. 

如图，在平面直角坐标系中，A（﹣1，0），B（3，0），C（0，2），CD∥x轴，CD=AB．

暴露在空气中的食品比真空包装的食品容易腐败变质；生猪肉比煮熟的猪肉容易腐败变质；加盐腌制的鱼比鲜鱼存放时间长．

（1）通过上述资料，你提出的问题是：　____ 

（2）根据你提出的问题，请你作出相应的假设：____ 

（3）小亮同学设计了一个实验方案：取三支试管，编号并做以下处理：

试管编号	1号试管	2号试管	3号试管
处理方法	加入新鲜的肉汁，置于30℃环境中	加入新鲜的肉汁并煮沸，置于30℃环境中	加入新鲜的肉汁并煮沸，置于0℃环境中

本方案中1号试管能与____ 号试管形成一组对照实验；3号试管能与____ 号试管形成一组对照实验．

（4）随着时间的推移，你认为最先发出臭味的是____ 号试管，最后发出臭味的是____ 号试管．

（5）通过上述实验可知，在____ 条件下保存食品的时间较长，因为在这种温度下微生物的____ 和____ 受到抑制．

（6）通过上述探究实验，请你写出两种保存食品的方法．____ 和____ ．