--What do you think of maths?

--My favourite. It’s        for me to study of all the subjects in school.

A．more difficult

B．the most difficult

C．less difficult

D．theleast difficult

半夏厚朴汤的功用是（）。

A.行气降逆，燥湿化痰

B.行气散结，降逆化痰

C.降逆止呕，下气除满

D.行气消痞，燥湿除满

E.行气降逆，散满宽胸