题目

血钾与组织液和细胞内液中钾的关系正确的是（     ） A．血钾→组织液K + 细胞内液K+ B．血钾组织液K + →细胞内液K+ C．血钾组织液K + 细胞内液K+ D．血钾→组织液K + →细胞内液K+ 答案：CIt suddenly occurred to him________he had left his keys in the office.   (2012·江西，25)A．whether B．where C．which D．that