邮政普遍服务的业务范围包括:信件、单件重量不超过()的印刷品、单件重量不超过十千克的包裹的寄递以及邮政汇总不。
A、三千克
B、五千克
C、十千克
D、二千克
参考答案:B
.——The English teacher spoke so fast that I couldn't ________ what he said.
——He said there would be a discussion ________ the lecture.
A.understand; being followed by
B.follow; following
C.catch; to be followed
D.hear; followed by
高位腰椎间盘突出症的特点是()。
A.下肢肌肉无力少见
B.腰腿痛症状重,范围大
C.直腿抬高试验多阴性
D.应尽量保守治疗
E.括约肌功能障碍多见