铁碳合金相图中S点(温度727℃、wC=0.77%)为______点，AE线为______线，即奥氏体结晶终了线。
参考答案：共析 固相
—Guess what! I have got A for my term paper.
—Great! You _______ read widely and put a lot of work into it.
A．must
B．should
C．must have
D．should have
抗病原微生物作用较强的成分是（）
A.葛根总黄酮
B.葛根素
C.麻黄挥发油
D.柴胡多糖
E.D-伪麻黄碱
