Tus ntawm kos npe, @, ib txwm nyeem nrov nrov li "ntawm"; nws kuj yog feem ntau hu ua lub cim ntawm, kev lag luam ntawm lossis chaw nyob kos npe. Nws yog siv los ua tus accounting thiab invoice abbreviation lub ntsiab lus "ntawm tus nqi", tab sis tam sim no nws tau pom ntau dav hauv email chaw nyob thiab social media platform handles.
ATT txhais li cas?
ATT txhais tias " Lub Sijhawm no. "
txhais tau tias ntshai dab tsi?
1 kom puv lossis puv nrog kev ntshai lossis ceeb. 2 tr; feem ntau ua raws li: deb lossis tawm mus tsav (tawm) los ntawm kev ntshai. 3 tr (U. S. thiab Canadian)
Lub ntsiab lus ntawm phthalic yog dab tsi?
: a crystalline cyclic acid anhydride C8H4O3siv tshwj xeeb hauv kev ua alkyd resins.
YPuas phthalic acid puas yog dicarboxylic acid?
Phthalic acid yog an aromatic dicarboxylic acid, nrog mis C6H4 (CO2H)2. Nws yog ib qho isomer ntawm isophthalic acid thiab terephthalic acid. … Phthalic acid yog ib qho ntawm peb isomers ntawm benzenedicarboxylic acid, lwm tus yog isophthalic acid thiab terephthalic acid.