用户在使用I/O设备时，通常采用（）
B
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Idaresaythatthepriceweoffercomparefavorablywithanyquotationyoucanobtainelsewhere.
Peoplethrowthingsawayandbuynewonesinsteadofrepairingthemandusingagain.Whatdoyouthinkmaybethereasonsforthis?Whatproblemsmightthiscauseinsociety?
Weareintroducingourselvesasoneoftheleadingexportersofthesamelineofbusiness.
Thesefiguresaregrossunderestimatesofthetrueincidenceofoccupationalill-health.
Student or work?