成熟卵泡的特点为()
A.卵泡腔内有卵泡液存在
B.卵丘形成
C.放射冠出现
D.颗粒细胞分泌卵泡液
E.直径可达15~20mm
参考答案:A, B, C, D, E
—When did you play the piano yesterday, Tom?
—Mum, I _____ to play it as soon as I _____ home and finished playing when you came back.[ ]
A. began, arrived
B. will begin, get
C. begin, arrived at
烹饪饮食美感与艺术美感有着一定的联系,占有同等重要的位置。