A person is said to be unreliable if what he does is _______ what he says.    [ ]

A. on the contrary to  

B. contradictory to  

C. appropriate to  

D. appealing to

用空气干燥法测定煤的空气干燥基水分时，正确的加热温度范围是（）℃。

A.45～50；

B.70～80；

C.105～110；

D.145～150。