肾小管髓袢升支的功能主要是 ()
A.重吸收溶质
B.重吸收水
C.重吸收水而不重吸收溶质
D.水与溶质均重吸收
E.水与溶质均不重吸收
参考答案:A
Though they are new in the film, _____ they do very well. [ ]
A. but
B. however
C. yet
D. so
双电源转换系统是否有缺相转换功能?