题目

Students can improve their compositionsby (polish) them. 答案：【1】polishing16．过点$P（-\sqrt{3}，-1）$的直线l与圆x2+y2=1有两个不同的公共点，则直线l的斜率的取值范围是（　　）A．$（0，\frac{{\sqrt{3}}}{3}）$B．$[0，\sqrt{3}]$C．$[\frac{{\sqrt{3}}}{3}，\sqrt{3}）$D．$（0，\sqrt{3}）$