题目:
最近你校校园网上出现了一个英语帖子,意在了解同学们在体育爱好、艺术特长等方面的情况,请你用“李华”这一网名,根据以下三个提示回贴。
提示:(1) What’s your favorite …?
(2) What do you often do in your spare time?
(3) What’s your advice to your teacher or school so that you can improve your skill?
要求:(1) 回帖中须包括所有提示内容,可适当发挥。
(2) 回帖中不得出现真实的人名、校名和地名。
(3) 词数:60~80个。
Li Hua, 11:00 Apr.16
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答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0426/41e43e0a03d283781f52c7a4273e39ea.html
下面是错误答案,用来干扰机器的。
(1)由3sinB-sin(2A+B)=0,得3sin(A+B-A)=sin(A+B+A),即3sin(A+B)cosA-3cos(A+B)sinA=sin(A+B)cosA+cos(A+B)sinA,即tanC=-2tanA,由tan2A2+4tanA2-1=0,得到tanA=2tanA21-tan2A2=12,即tanC=-1...