原式=(a-4)2(3+a)(3-a)×(3+a)2(4+a)(4-a)=(a-4)(a+3)(a-3)(a+4)．
关于母乳喂养以下不正确的是（）。
A.产后30min内早吸吮
B.能增强新生儿免疫力
C.定时、定量进行母乳喂养
D.防止母亲产后出血
E.增进母婴感情
Was it in the forest _____they found the lost cow?
[ ]
A. where
B. that
C. when
D. as
