题目

听句子，选答语（） A . It's on April 2nd. B . It's interesting. C . Because it's fun. 答案：C14．cos（-$\frac{16π}{3}$）+sin（-$\frac{16π}{3}$）的值为-$\frac{1}{2}$+$\frac{\sqrt{3}}{2}$．