制备HCl气体,下列方法可行的是①NaHSO4+MnCl2(固)共热 ②浓H2SO4+浓HCl共热 ③浓H2SO4+KCl(固)共热 ④浓H2SO4+NaCl(固)+MnO2共热
Lucy held her head up like a queen________ Bill was telling his tale.( )
A.afterB.beforeC.whileD.until
Yesterday Mom________ me some money to buy a dictionary.( )
A.givesB.gaveC.has givenD.was giving
You’ll have to get your parents'________ if you want to go on the trip.( )
A.achievementB.announcement
C.agreementD.advertisement
________ exciting news! The Chinese team successfully arrived at the peak of Qomolangma.( )
A.WhatB.What anC.HowD.How an
________ hopes for a sweet home as it provides us with warmth and trust.( )
A.NoneB.EveryoneC.NobodyD.Somebody