题目

【1】Chinese folk culture tradition ____________ the campus of the American university since the exchange centers were founded.【2】Sometimes, small action ____________ by many people can help those in trouble a lot.【3】Can anybody ____________ how this Chinese vase was broken yesterday?【4】With the coming National Day, the trees in the park __________ different colors of flowers.【5】The man was determined to ___________ smoking, for the doctor said it was bad for his daughters.过点且与曲线相切的切线与直线的位置关系是 A．平行      B．重合  C．垂直  D． 斜交