富油脱苯一塔式生产（）、（）和（）三种产品。
参考答案：轻苯；溶剂油；重苯
The Enlightenment Movement brought about a revival of interest in the old classical works in the field of literature. This tendency is known as ______.
A. humanism B. realismC. symbolism D. neoclassicism
膳食调查方法中常用的较精确的是( )
A．回顾询问法 B．称重法C．化学分析法 D．查账法
