Some people want to be sent into space after their death, others want to lie deep under the sea. But
most people want to go into the freezer (冷藏库). These are believers in cryogenics (低温冷冻学). 　　
     Now some diseases can't be cured, but they may be cured sometime in the future. So some people
hope that their bodies can be frozen after they die. When a cure is found，warm up his or her body, bring
it back to life and take the cure. Once the body is frozen, it is kept in liquid nitrogen (液态氮) at a
temperature of 328 degrees below zero. 　　
     Now around a thousand people are going to take cryogenic treatment (处理), though most scientists
say it won't work. If we freeze huge creatures (生物) like humans, every one of their cells (细胞) will be
broken. Can they be brought back to life in the future?
阅读短文，然后根据其内容回答下列问题。
1. Where do most people hope that their bodies are kept after their death? 　
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2. Why do they want the world to keep their bodies well?
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3. How do scientists usually keep a dead man's body?
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4. How many people are going to take cryogenic treatment after they die?
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