The girl is Linda Black. Linda is her ________ name.
A:first
B:last
C:family
D:middle
下列现象不可以用惯性来解释的是()
I don't have a lot of time ___________ sports.
如图,在△ABC中,∠C=90°,AC=2,点D在BC上,∠ADC=2∠B,AD=5,则BC的长为( )