Amy:Who's that ____ (bay boy)?
Chen Jie: He's ____ (me my) brother.
Amy: Is she ____ (you your) mother?
Chen Jie: Yes , ____ (She she ) is.
Amy: Is he ____ (you your) father?
Chen Jie: No, he isn't. ____ (he's He's ) my teacher!
已知矩形ABCD的顶点都在半径为5的球O的球面上,且AB=6, BC=25,则棱锥O-ABCD的侧面积为( )
If you feel ____ (stress), try to be ____ (relax).
— Well, it's hard to say, probably great, or maybe not.
下列微粒结构示意图中,表示阴离子的是( )