A:288+36π
B:60π
C:288+72π
D:288+18π
矩形ABCD中A(1,1),B(2,3)则直线BC的斜率为( )
根据句义,用括号中所给词的适当形式填空。 May is the____month of the year.(five)I have three____ . (note)Mrs Li ____our English teacher.(be)This ruler is____ .(you)The girl has a____eating habit.(health)
当你想知道别人的生日时,你可以问:( )