题目

 We had _______ 8-day holiday during this National holidays, but some of us felt unhappy because of _________heavy traffic on the highways. A. an, the  B. a, the   C. a, a   D. an, a 答案：A15．一次函数y=-$\sqrt{3}$x+$\sqrt{3}$的图象分别与x轴、y轴交于点A、B，点C是y轴上一点，若△ABC是底角为30°的等腰三角形，试求点C的坐标．