题目

A young boy was sitting in the back seat of the car eating an apple. He asked his father, “Why does my apple turn brown?” his father answered, “When the skin is removed, air reaches the flesh of the apple and causes oxidation. This changes the apple’s molecular structure and results in a brownish color.” The boy asked, “ Daddy, what are you talking about?” I know how that boy feels. Sometimes I want answers to some of those confusing questions that we all meet with, such as how to get through difficult times or what to do in a tough situation. I just want to get it right. 读“某区域地质剖面简图”，图中甲、乙、丙三处的地质构造分别是 A、断层、向斜、背斜B、断层、背斜、向斜C、向斜、断层、背斜D、背斜、向斜、断层