数控车床工件坐标系又称（）。
A.机床坐标系
B.编程坐标系
C.直角坐标系
D.固定坐标系
参考答案：B
《素问·痿论》提到痿证的病因有（）
A.情志
B.寒
C.饮食
D.劳倦
E.炅
Through the economic reform, the economic situation of China _________ much better than it used to be.
A．turned into
B．turned off
C．turned in
D．turned out
