赠品广告
参考答案：以小型礼品或纪念品的馈赠为手段，博取用户对企业的好感和记忆。
A．长铜丝的电阻大
B．两铜丝粗细相同时，长铜丝的电阻大
C．细铜丝的电阻小
D．两铜丝长度相同时，粗铜丝的电阻大
Many of the electric and electronic products we purchase and consume today are what some industrial experts call " homogeneous toys".
A．identical
B．homosexual
C．unrelated
D．distinguishable
