The invention of steam engine greatly sped up the industrial revolution, which _____ a lot to the take-off of the world. [ ]

A. led    

B. contributed  

C. constructed  

D. exposed

治疗脾虚气滞，脘腹胀痛及湿热泻痢里急后重，宜选用（）

A.香附

B.乌药

C.苍术

D.木香

E.青木香