题目

 — Did the radio say ________—Yes, from Hunan.       A. how the bad rice came                    B. where the bad rice came from       C. how did the bad rice come               D. where did the bad rice come from    答案：B金星的半径是地球的0.95倍，质量为地球的0.82倍，金星表面的自由落体加速度是多大?金星的第一宇宙速度是多大?