焦油加工的主要任务是获得酚、萘、蒽等纯产品和()等粗产品。
参考答案:洗油沥青
—How ____ the medicine tastes!
—Yes. But the medicine will really work soon after you take it.
A.terrible
B.delicious
C.sweet
D.nice
胃肠外营养: