最低共熔温度
参考答案：
物料在加热过程中，两种或两种以上组分开始出现液相的温度称为最低共熔温度。
Laura was away in Paris for over a week. When she got home, there was a pile of mail _______ for her.
A．waited
B．to wait
C．waiting
D．was waiting
J857 CrNi焊条使用前应在烘干箱内经400℃烘干（）h，焊条使用时取出放在温度为100～150℃的保温桶内，随取随用。
A.0.5
B.1
C.1.5
