口算。
12-4=____ 17-8=____
— Can you play the piano?
—Yes, I . I often practice it on weekends.
如图,将△ABC绕点A逆时针旋转一定角度,得到△ADE,若∠CAE=65°,∠E=70°,且AD⊥BC,则∠BAC的度数为( )