也许您会很奇怪，钥匙的作用不就是开锁吗？难道还有别的作用？您还真猜对了，钥匙确实还有其它的作用。不信，您往下看就知道了。我的外甥正在读初中，他所在的学校属于寄宿制学校，每两个星期才能接出来一次。每次送他返校时，外甥总要在学校里四处寻找他的同学要宿舍的钥匙 Perhaps you will be very strange, the key role is not unlock it? Is there any other role? You really guessed it, the key does have other effects. Do not believe, you will know when you look down. My nephew is in junior high school and his school belongs to a boarding school and is available every two weeks. Each time I send him back to school, my nephew always wants to find the keys to his dormitory in school