thaum lawv taw qhia; North, South, West, thiab lwm yam thaum lawv qhia thaj chaw. Cov kab lus xws li Mid Atlantic, Silicon Valley, Dixie, Sun Belt, thiab Midwest yog cov peev txheej.
Puas yog cov npe tshuaj muaj nqis?
Nkauj lub npe tshuaj tsis muaj nqis tshwj tsis yog lawv yog thawj lo lus ntawm kab lus.
Yuav tsum tau cov khoom lag luam?
Nyob hauv lub ntiaj teb kev lag luam, txhais tau tias ib lub npe lossis cov npe khoom lag luam yuav tsum tau sau npe, tshwj tsis yog tias tau kawg, lub tuam txhab muaj cov npe lag luam ntawm tus lej qis, xws li "iPod. "
Yuav tsum tau txhuas lub peev?
Npe ntawm cov tshuaj lom neeg: e.g. aluminium, hlau. Whereas nws yuav tsum tau muab sau tseg tias thawj tsab ntawv rau cov cim ntawm cov ntsiab lus no yuav tsum yog tus lej. Cov npe ntawm kev sib raug zoo thaum muaj kev hloov pauv xws li cov lus muaj npe.
Puas yog cov npe pob zeb muaj peev txheej?
Txawm hais tias tsis siv ntau los ntawm physicists, cov npe ntawm cov zaub mov yeej tsis muaj peev xwm ua tau, piv txwv li, dolomite, pob zeb diamond, txawm tias muab los ntawm lub npe zoo (fosterite, smithsonite). Hauv cov piv txwv no, "Einstein's" thiab "Auger" tau sau npe vim tias lawv yog cov npe zoo (npe) siv los ua adjectives.
