肾衰患者相对缺乏的物质是()。
A.钙
B.钾
C.镁
D.磷酸盐
E.复方氨基酸
参考答案:A
解析:肾衰患者钙吸收减少,易导致低钙。
Though it is 30 years we last met, I still remember the scene ______ we got separated on a rainy day.[ ]
A. since; where
B. before; which
C. since; when
D. before; where
在室内煮咖啡,很快能闻到香味,煮沸后香味更浓,说明______越高,______越激烈。