题干
—I’m feeling terrible and lonely all the time, what should I do?
—______! Try to talk to your friends, and take good care of your health.
—______! Try to talk to your friends, and take good care of your health.
A：Go ahead
B：Take it easy
C：That’s right
D：Don’t mention it
答案(点此获取答案解析）
B
上，a为曲线在点P处的切线的倾斜角，则a的取值范围是 （ ）