烦死了
昨天去西冲玩。溪冲or西冲,you decide. 前天夜里就想着是不是把周日用来看眼睛、买车票之类,后来想着还是去吧。上午拔河,中
吃柚子。不知道会不会让眼睛也好受一点。
刚才算题,还是那道解析几何,终于有了个很漂亮的结果。两个图,其中一个终于能匹配上
update:
嗯,输错了一个符号。结果是正确的。不知道为什么那个开始时会匹配,也许是换另一个的
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