如果购买者在购买商品或者服务时，自愿接受经营者的附加条件，那么这些附加条件就不属于不正当竞争行为。
参考答案：对
周期来压
We _____ last night,but we went to appreciate the flowerbeds and streetlights in Tian’anmen Square instead.
A．might study
B．could study
C．should have studied
D．must have studied
