--Excuse me,_________?   --That’s ￡200 altogether, sir.

A．what does it cost

B．is it the right amount

C．could I have the bill

D．can I place an order

肾小管重吸收最重要的部位是（）.

A.近端小管

B.远端小管

C.髓袢细段

D.髓袢粗段

E.集合管