判断铁丝在氧气中燃烧是否发生了化学变化的根本依据是 [ ]
A．火星四射
B．发热
C．生成黑色固体
D．形状改变了
答案：C
爸爸把6000元存入银行，定期3年，年利率是3.33%，到期可得利息是______．
— How much _____ the socks?
— Three dollars. [ ]
A. is
B. are
C. do
D. does
