A:①②③
B:①②④
C:①③④
D:②③④
用所给词的适当形式填空。①There ____ (be) some beef and eggs in the noodles.②I would like you____ (come) to my house.③Would you like some juice ____ (drink)?④I want to buy some ____ (tomato) to make ____ (tomato) noodles. ⑤She ____ (have) an egg, a small bowl of chicken noodles and two apples every day.
下图是甲、乙、丙三个服务中心的服务范围示意图。读图完成下列问题。
△ABC中,内角A,B,C所对的边分别为a,b,c已知△ABC的面积为315,b-c=2,cosA=-14 ,问:(1)求 a 和 sin C 的值(2)求 cos 2 A + π 6 的值