Tau txais tshuaj rau kev sib txuas tom ntej yog ib qho haujlwm tseem ceeb ntawm chemistry. Niaj hnub no peb yuav tham txog cov extraction ntawm xws li ib pab pawg neeg ntawm cov tshuaj xws li alkenes. Lawv yog cov hauv paus rau ntau qhov kev xav, tab sis yuav luag tsis tshwm sim hauv qhov xwm txheej
Cov kab lus yuav sib tham txog cov qauv sau ntawv ntawm kev tsim cov lus nug sib faib, intonation thiab cov teeb meem ntawm kev txhais ua lus Lavxias