学生犯错一般有三种情况：其一是（）；其二是（）；其三是（），对此我们必须区别对待，不能一概而论。
参考答案：犯错不知错；犯错不知觉；知错也犯错
The nurse teaches the client with peptic ulcer disease about how to effectively adjust his response to work-related stress. Which of the following statements by the client indicates that the education is effective
A．"My job is too stressful. I will have to find a different career. "
B．"I don't have any control over my stressors at work. My coworkers are difficult to work with. "
C．"Well, I guess this ulcer means I won't be able to work toward a promotion. "
D．"I will have to improve my ability to cope with stress. "
如果AB所在的纬度为60度，则纬线段AB的长度为（）
A.5000km
B.10000km
C.2500km
D.3000km
