细辛的毒性成分是()
A.葛根素
B.桂皮醛
C.柴胡挥发油
D.麻黄挥发油
E.黄樟醚
参考答案:E
铁碳合金相图对轧钢生产有什么意义?()
A.确定加热温度
B.确定开轧温度
C.确定终轧温度
D.确定热处理工艺
E.确定冷却工艺
Output is data that has been processed into useful form called (72) . That is a computer processes input into output.
A.data
B.information
C.interface
D.system