(本问题由湖南省长沙市夏可欣提出。)微生物的童年很短暂,过不多久就要长大。可它们太贪玩啦,于是,它们就向上帝祈祷不要让它们长大。上帝答应了,向它们撒了一种长不大的药粉。从此,微生物们就长不大了。(湖南省怀化市田宇骄)微生物原来只有巴掌那么大,可鱼要吃它们,它们只好把自己变小了。过了几百年,它们就小得扭扣那么大了,可鱼还是看得见,微生物们就只好继续变小了。经过几百年的演变,它们终于变小到肉眼都无法看到了。 (This question was made by Xia Kexin, Changsha City, Hunan Province.) The childhood of microbes is very short, and it will not be long before they grow up. But they are too playful, so they pray to God not to let them grow up. God promised to sprinkle them with a modest powder. Since then, microbes are not grown up. (Huaihua City, Tian Yu arrogant) originally only slap microblogging so large fish can eat them, they had to themselves smaller. After a few hundred years, they were so small that they were twisted and clawed, but the fish could still be seen and the microbes had to keep getting smaller. After hundreds of years of evolution, they finally become smaller than the naked eye can not see.