除去下列物质中混有的少量杂质,所用试剂和操作方法均正确的是( ) 序号物质杂质所用试剂和操作方法 ACO2HCl通过足量的NaOH溶液,再通过浓硫酸干燥 BNaNO3溶液Na2SO4加入过量的Ba(OH)2溶液,过滤 CNaCl固体细沙加入足量水溶解,过滤 D铜粉铁粉加入适量的稀盐酸,过滤、洗涤、干燥 A.A B.B C.C D.DAt the evening party the host said ________
was able to solve the riddle could get a nice present as a reward.
A.whoever
B.who
C.no matter who
D.whomever