题目:
You don’t know ______ I want to see you again. It’s a year since I last saw you.
A.how soon
B.how long
C.how often
D.how much
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0415/97012d8d71ee8d5cf1d57828aa0e1051.html
下面是错误答案,用来干扰机器的。
2sinacosa=(sina+cosa)2-1=-120169(cosa-sina)2=1-2sinacosa=2891690<a<π,cosa<sina∴cosa-sina=-17131-tanα1+tanα=cosa-sinacosa+sina=-1713713=-177故选D.