细胞内液的主要阳离子是
A.Ca2+
B.K+
C.Mg2+
D.Na+
E.Zn2+
参考答案:B
解析:本题考查细胞内外的例子分布,钾是细胞内液中主要阳离子,细胞外含量很少。
Jimmy needs to improve his technique if he __________ gold in the 2008 Olympics.
A.wins
B.is winning
C.is about to win
D.is to win
具有温脾开胃摄唾、暖肾固精缩尿作用的药物是()
A.益智仁
B.补骨脂
C.杜仲
D.蛤蚧
E.冬虫夏草