摘要：假设你是一名来自火星的小朋友.现在正在参观地球.你看到地球和火星有许多不同点．请根据下面的表格.把这些不同点做一总结．可以展开合理的想象．词数:80左右(开头已给出.不计入总词数)． Earth Mars polluted and crowded clean.lots of space gravity is not a problem． gravity is three-eights of that on Earth． many types of shoes special boots many kinds of food food in the form of pills taking exams at school no schools on Mars Now I will tell you some differences between Earth and Mars．

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