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
出现呕血说明胃内储积血量至少达到 （）
A.150～200ml
B.250～300ml
C.200～300ml
D.100～300ml
E.250～350ml
The nurse teaches the mother of an infant diagnosed with congenital hypothyroidism about daily oral levothyroxine sodium (Synthroid) therapy. Which of the following signs and symptoms would indicate an overdose
A．Anorexia.
B．Constipation.
C．Sweating.
D．Sleepiness.
