治痿者独取阳明出自于（）。
A.《医学心悟》
B.《素问》
C.《伤寒论》
D.《金匮要略》
E.《丹溪心法》
参考答案：B
A control chart has all of the following characteristics EXCEPT: （）.
A．It illustrates how a process behaves over time.
B．It is used to determine whether or not a process is stable or has predictable performance.
C．It illustrates how various factors might be linked to potential problems or effects.
D．It can be used to monitor any type of output variable.
在碳素钢常存元素中，有益的元素是（）。
A.硫
B.磷
C.硫、磷
D.硅、锰
