A:CH3CH=CH2
B:CH2=CHCH=CH2
C:CH3=CHCH3
D:CH3﹣C≡CH2﹣CH3
I go to _______ home every Sunday. ( )
一汽车在路面情况相同的公路上直线行驶,下面关于车速、惯性、质量和滑行路程的讨论正确的是( )