A:Never mind
B:That’s right
C:My pleasure
D:I’d love to
已知△ABC中∠A,∠B,∠C的对边分别为a,b,c若a=c=6+2且∠A=75°,则b=( )
What are the ________ doing? ( )
下列关于遗传的物质基础的叙述,正确的是( )