I don't have a brother ____ sister. [ ]
A. or
B. a
C. the
答案:A
SLE可出现
A.SLE可出现
肾脏重吸收能力最强的部位是( )
A.近曲小管 B.髓袢 C.髓袢升支D.远曲小管 E.集合管