简述营销人员与消费者的沟通技巧。
参考答案：1、吸引消费者的注意和兴趣
2、激起消费者的购买欲望
3、增加消费者的购买信心
Which of the following is true about the immunity to HIV
A．It is partly resistance to the mutation.
B．More Europeans have it than the people on other continents.
C．It is the result of outbreaks of the plague.
D．It is a mutation that protects white blood cells.
活塞运动速度与流入液压缸的液体（）有关。
A、流速
B、流量
C、压力
D、压差
