A:10
B:1
C:0.1
D:0.01
以点(1,3)和(5,﹣1)为端点的线段的中垂线的方程是____
下列有关人体血液和血液循环的叙述错误的是( )
—I have trouble learning math this term.
—You should pay more _______ to your teacher's advice.