var re = /^[a-zA-Z0-9_.]+\@[a-zA-Z0-9-]+.[a-zA-Z]{2,4}$/;
var re = /^<([a-zA-Z]+\s[a-zA-Z]+)>\s([a-zA-Z0-9]+\@[a-zA-Z0-9]+.[a-zA-Z]{2,4})$/;
var re = /^[a-zA-Z0-9_.]+\@[a-zA-Z0-9-]+.[a-zA-Z0-9-]{2,4}$/;
var re = /^[a-zA-Z0-9_.]+\@[a-zA-Z0-9-]+\.[a-zA-Z0-9-]{2,4}$/;
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Amayadream
第一题:
第二题: