A:____
B:Good morning.
B:My name is Jack.
B:I'm twelve.
B:Table tennis.
B:OK.
A.How old are you?
B.Good morning.
C.Let's play it in the afternoon.
D.What's your name?
E.What's your favourite sport?
将pH=10的氢氧化钠溶液加水稀释后,所得溶液的pH可能是( )