—Just foget it.
A:You're kidding
B:You're right
C:It's not a good idea
D:It's not a big deal
84+49+16+51=____
已知:△ABC中,AB=AC,∠B=α.
在长方体ABCD﹣A1B1C1D1中,AB=6,BC=4,AA1=2,P,Q分别为棱AA1,C1D1的中点,则从点P出发,沿长方体表面到达点Q的最短路径的长度为( )