A:K+、Na+、HCO3-、Cl-
B:K+、AlO2-、Br-、Cl-
C:Na+、Cl-、NO3-、SO42-
D:Al3+、NH4+、Cl-、SO42-
送李端
卢纶
故关①衰草遍,离别自堪悲。路出寒云外,人归暮雪时。
少孤为客早,多难识君迟。掩泪空相向,风尘②何处期?
【注】①故关:故乡。②风尘:指社会动乱。
读世界局部图,回答下题.
To his parents' d____ (高兴), he has made a full recovery after the accident.