The river______ surface used to be covered with waste and rubbish is now taking on a new look.

A．of which

B．along with

C．where

D．whose

母乳喂养时，避免母亲 * * 皲裂最主要措施是（）

A.让新生儿早吸吮多吸吮 * *

B.喂哺前消毒 * *

C.苯甲酸雌二醇涂 * * 以防皲裂

D.喂哺后清洗 * *

E.保持新生儿恰当吸吮母乳的姿势（即婴儿将 * * 及大部分乳晕含入口内吮乳）