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
下列哪项不是青枝骨折的特征（）
A.多发生在儿童
B.是一种不完全骨折
C.无明显功能障碍
D.无局部压痛及纵形叩击痛
E.畸形不严重
—We are planning to have a casual get-together this Saturday or Sunday. Are you coming?
— ________. I’ve got rather a full day this weekend.
A．I hope so
B．Sounds great
C．I’m afraid not
D．You’d better not
