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随时随地学习
随时随地学习
怎样保护水资源Watr is vry important to th human bings.But now many rivrs and laks ar pollutd.
And what shall w do ???
W can do lik ths things:
First w must protct th factory form pouring wast watr into th rivr
Scond w should stop popl from throwing littr into th rivr.many kinds of littr may pollut th nvirnmnt.
Finally w can tll th visitors how important th watr is.
Aftr doing ths things,I think watr will bcom clarr soonr or latr.
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