Didyouknowthefo的精选

问题详情：阅读理解；读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。Didyouknowthefollowingfactsaboutwater?      ThereisaboutthesameamountofwateronEarthnowastherewasmillionsofyearsago....