Therapiddevelopmentofscienceandtechnologyhasbroughtaboutgreatchangestohumanlife.Thegreatbenefitsbroughtaboutbythisprogresshavebeenhailedineverycorneroftheworld.Newelectronicapplianceshaveenabledourjobstobedonefasterandmoreefficiently.MobilesandQQhavemadeiteasiertocommunicatewithotherpeople.Internethasenabledustoknowandunderstandotherculturesandsocietybetter.However,thedisadvantagesaboutthisdevelopmentshouldnotbeneglected.Somescientificinventionshaveevencausedgreatharmsordisasterstomankind.Forexample,advancedtechnologycanbeeasilymanipulatedbyirresponsiblepersons.Besides,we’llbetoodependentonit.Whentechnologyfails,wearehelpless.Sometimes,sciencemayaffectourhealthandlifestyles.Thechemicalsmaybehazardous.What’sworse,scienceandtechnologymayevendestroyoursimpleandhealthylife.Inaddition,theappearanceofnewtechnologymayinvadeourprivacy.Tosumup,humansmustbealertagainstthepossibleharmwhileenjoyingthebenefitsfromtheadvancingscienceandtechnology.1.catastrophe,mishap,