【简答题】在△ABC中,角A、B、C的对边分别是 、b、c。若 ,则 A、1 B、2 C、 D、
【简答题】在△ABC中,a、b、c分别是△ABC内角 A、B、C的对边,且满足bcosC=2acosB-ccosB。 (1)求内角B的大小; (2)求cosA+cosC的取值范围。
【简答题】Passage 22 Tom was shocked to realize that the two-month summer vacation 1 (pass) before he knew it. He wondered 2 he had been doing during the summer holidays. Then he remembered the days and nights ...
【简答题】Directions: Listen to the passage and fill in the blanks with the exact words you ’ve heard . My dream is to go mountain biking in the French Alps someday. The area is famous for its 1. , and I hear t...