________pollution control measures are expensive, many industries hesitate to adopt them.

A．Although

B．However

C．Because

D．On account of

治疗Wernicke脑病用（）

A.高铁血红蛋白还原剂

B.维生素B₁

C.阿托品和解磷定

D.美蓝或维生素C

E.高压氧治疗