推销人员应选择最有可能成为用户的顾客，有重点地进行推销，提高推销效率。
参考答案：对
______ his home is the farthest from the school, he is the first one to get to school every day.[ ]
A. Because
B. As
C. Although
D. If
示范的有效性取决于许多因素，如（ ）。
A．示范者的身份
B．示范的速度
C．示范的准确性
D．示范的过程
E．示范的时机
