灰的熔化特性由变形温度、软化温度、融化温度来确定。对于固态排渣炉，一般用软化温度来判别燃料燃烧时是否容易在炉内结渣。( )
参考答案：对
A．mgtgθ
B．mgsinθ
C．μmg
D．μmg
— When shall we meet again next week — （）day is possible. It's no problem with me.
A. Either
B. Neither
C. Every
D. Any
mgtgθ
mgsinθ