农村常用盐水来选种子,它的依据是下列物理量中的:[ ]
A、重力
B、密度
C、体积
D、质量
答案:B
Nearly all the people believe confidence is the key to success.
A.interviewing
B.having interviewed
C.to interview
D.interviewed
醛固酮分泌增多可使下面哪些血清电解质发生改变()。
A.高Na+
B.高K+
C.低K+
D.低Na+
E.低Cl-