咯血伴呛咳为（）
A．钩端螺旋体病
B．肺结核
C．肺梗死
D．支气管肺癌
E．支气管扩张
参考答案：D
____in faraway northwest , this place has its beautiful fresh air .
A．Being located
B．Located
C．locating
D．To be located
管制图的主要作用是（）。
