将电阻依次首尾相连，组成无分支的电路，叫电阻的并联。
参考答案：错
John promised his doctor he _____ not smoke, and he has not smoked ever since. [ ]
A. might
B. should
C. could
D. would
关系营销必须遵循的理念除了“主动沟通”、“承诺信任”外，还有一点是（）
A.强调创造消费者
B.交易导向
C.顾客至上
D.互惠
