下列属于化学变化的是（ ）
A．火药爆炸
B．汽油挥发
C．冰熔化成水
D．水银受热膨胀
答案：A
–May I have a look at your new iPad mini? –_______________
A．Sure, here you are.
B．You are welcome.
C．Hold on, please.
D．I agree with you.
军军的妈妈今年32岁，他外公的年龄是妈妈的2倍．军军的妈妈和外公今年一共多少岁？
