A:2s22p4
B:3s23p4
C:4s24p4
D:5s25p4
— In the present, most of us have no enough money to afford the houses.
— Yes, they are too expensive in Shenzhen.
一个形式如圆锥的冰淇淋纸筒,其底面直径为6cm,母线长为5cm,围成这样的冰淇淋纸筒所需纸片的面积是( )
下列有关细胞工程的叙述,错误的是( )
赞成“自助游”
不赞成“自助游”
合计
男性
30
女性
10
100