题干
20. The reason ________ many people like the film Not One Less is ________ most of the people in the film use their real names and play themselves.
A：why; because
B：for; that
C：for; because
D：why; that
答案(点此获取答案解析）
D
表示的平面区域是一个三角形，则实数s的取值范围是（ ）