A:2 2 ,2 5
B:(2 2 ,3 2
C:(3 2 ,2 5
D:(0,2 2 )∪(2 5 ,+∞)
在△ABC中,∠A,∠B都是锐角,若sinA=32,cosB=12,则△ABC的形状为____ 三角形.
甲乙两人同时解方程组ax+by=2cx-7y=8时,甲正确解得x=3y=-2,乙因抄错c而解得x=-2y=2,则a,c的值是( )
— Mum, can you play table tennis with me now?
— Sorry, I'm busy. You can ask your father _________ me.
I like____ ____and____.