当采用排列图法分析工程质量问题时,将质量特性不合格累计频率为( )的定为A类问题,实施重点管理。
A.0~50%
B.0~70%
C.0~80%
D.0~90%
参考答案:C
心跳、呼吸骤停后最容易发生病理变化的脏器是()
A.肺
B.脑
C.肝
D.肾
E.心
Which of the following is the most widely accepted theory about the beginning of drama().
A.Drama came from seasonal changes.
B.Drama originated from ritual.
C.Drama evolved from stories.
D.Drama came from natural forces.