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?