第11题: [单项选择]门脉高压时,腹壁浅静脉的血流方向为 () A. 脐以上血流方向由下至上,脐以下血流由上至下 B. 脐以上血流方向由上至下,脐以下血流由下至上 C. 以脐为中心向四周伸展 D. 脐以上血流方向由上至下,脐以下血流由上至下 E. 脐以上血流方向由下至上,脐以下血流由下至上 参考答案:C
第18题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard. A. More than 8,000 million. B. More than 6,000 million. C. More than 2,000 million D. More than 1,000 million. 参考答案:C 答案解析:[听力原文] How many people are the victims of unclean water