选择题：细胞内液与组织液常具有相同的:　 (　 　 　 　 )(A)Na+浓度(B)K+浓度(C)总渗透压(

农村承包经营户的特征是()

甲对乙享有200万元的债权。甲将该债权让与丙,但未通知乙。对此,下列说法正确的是()

Mary filled in the application form, but she didn’t know which office _______.A.

_______ late 1990’s, about two thousand adults were enrolled in correspondence s

对1molVan der Was气体,有( )。