A:Much better than yours.
B:Yes. of course it’s very good.
C:It’s very kind of you to say so.
D:No, you are totally wrong~
如图,AB为⊙0的直径,点C、D在⊙0上,且∠ADC=52°,则∠BAC=____°.
济南2月份某天的最高气温为5℃,最低气温为﹣1℃,则济南这天的气温差为( )