眼镜店加盟
TherehasbeenlifeonEarthforaround3.5billionyears.Thefirstmicroscopicsingle-celledorganismsresidedintheworld’soceansandgraduallydevelopedintocomplex,multicellularorganisms,fromdinosaursinthebeginningtomammalsasweknowthemtoday.Thiswasaresultofevolution,whichisdrivenbynaturalselection:onlylivingthingsthatsuccessfullyadapttotheirenvironmentwillsurvive.