母乳喂养时，防止 * * 皲裂的最重要的措施是（）

A.保持新生儿正确吸吮母乳的姿势

B.哺乳前清洗 * *

C.哺乳后清洗 * *

D.哺乳后涂鱼肝油防止皲裂

E.让新生儿多吸吮

The Group of Eight (G8) ______ the richest eight countries in the world.

A．is consisted of

B．consists of

C．is made up

D．is composed with