在灯具标准的机械悬挂试验中，需将（）灯具重量的负载加在灯具上。
A.2倍
B.3倍
C.4倍
D.6倍
参考答案：C
He was busy with his work but he went to see his grandmother________.[ ]
A. sooner or later
B. now and then
C. more or less
D. over and over again
人员推销的基本策略主要包括( )。
A．试探性策略
B．刺激性策略
C．针对性策略
D．推动性策略
E．诱导性策略
