A：初级精母细胞
B：精细胞
C：初级卵母细胞
D：卵细胞
—No, you _______. It's 10 o'clock. You _______ go to bed.
— Are those shoes yours?
— No, they aren't.
— Whose shoes are they, ?
— They are Tom's.
0.973平方米＝____平方分米，2300平方厘米＝____平方米
