— ________.
A:Yes, they are
B:No, he isn't
C:Yes, she is
D:No, she isn't
用反证法证明:在△ABC中,如果M、N分别是边AB、AC上的点,那么BN、CM不能互相平分.
填一填
____光____色 ____目____行
____斤____两 ____头____臂
____山____水 ____牛____虎
____军____马 ____上____下