─ Does your mother have a hobby?
─ No, you call watching TV a hobby.
A:unless
B:although
C:if
D:until
将圆C:x2+y2+4x-2y=0平分的直线的方程可以是 ( )
①NaOH ②AgNO3 ③Na2CO3 ④NaBr ⑤FeCl2.