6+6+6改写成乘法算式是[ ]
A．3×6
B．6×6
答案：A
Who is going to London
A．Mary.
B．Susan and Mary.
C．Susan.
D．Neither Susan nor Mary.
扫描仪：显示器( )
A．电话：来电显示屏
B．眼睛：嘴巴
C．能量：热量
D．投资：消费
