A:This is my new friend, Gao Wei.
B:I have a new friend
— No, we didn't. It was put off ________ the heavy rain.
下列关于人体内环境的叙述,错误的是( )
①若m=n,则|m|=|n|;②若m=﹣n,则|m|=|﹣n|;③若|﹣m|=|﹣n|,则m=﹣n;④若|﹣m|=|﹣n|,则m=n.