题目

直线的倾斜角为α,且0°≤α≤120°,且直线l的斜率的取值范围是(    ) A.［-,+∞                                B.(0,+∞)C.(-∞,-或［0,+∞                  D.［-,0) 答案：C解析：k=tanα.当0°≤α＜90°时,tanα∈［0,+∞);当90°＜α≤120°时,tanα∈(-∞,-3.______ two pandas from Chinese mainland has become ______ hot topic in Taiwan. A. The, a           B. A, a     C. /, the    D. The, /