题目

The story of the movie Inside Out mostly takes place inside the mind of 11-year-old Riley as she moves from Minnesota to San Francisco. The main characters are Riley’s emotions 一 Joy, Sadness, Disgust, Anger and Fear, which guide her decisions and often compete with one another for control of her brain.   Fear is tall, thin, looks like a frayed(焦躁的）nerve and is purple. Not only that, his eyes are purple, too. Anger, which is red, looks like a brick and has red eyes. Disgust, who is green，has green eyes. Sadness，not surpridngly，is completely blue，and even looks like 17．当0≤x≤$\frac{π}{2}$时，函数f（x）=sinx+$\sqrt{3}$cosx的（　　）A．最大值是$\sqrt{3}$，最小值是$\frac{1}{2}$B．最大值是$\sqrt{3}$，最小值是1C．最大值是2，最小值是1D．最大值是2，最小值是$\frac{1}{2}$