据营养学家介绍:饮食中缺镁时,所吃的钙无法完全吸收,当钙与镁为2∶1时人体的钙与镁吸收最好。“纽崔莱钙镁片”是一种吸收效果最好的补钙剂。已知此钙镁片含碳酸钙(CaCO3)55%,则每100克可以补充钙 _____ 克,镁 _____ 克。 答案:22克;11克。 The driver can adjust the heating in winter and the air conditioning in summer to suit his own _______. A. preference B. convenience C. pleasure D. favour