.

—Was _________________ problem solved?

—We were trying to think of _________________ way out, but it was difficult to find one.

A．a; a

B．a; the

C．the; a

D．the; the

被定义为：“连续使用后易产生身体依赖性、能成瘾的药品”是（）。

A.毒性药品

B.精神药品

C.麻醉药品

D.放射性药品

E.直接作用于中枢神经系统的药品