第18题: [单项选择]心输出量是指() A. 每搏输出量 B. 心房进入心室的血量 C. 每分钟左心室所泵出的血量 D. 左、右心室输出的总血液量 E. 每分钟两心房进入心室的血量 参考答案:C
第19题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Because she was not at home. B. Because she was washing her hair. C. Because she didn’t hear the telephone ring. D. Because she didn’t want to answer. 参考答案:C 答案解析:[听力原文]
M: Where were you last night
W: I was in all evening. The phone rang while I was washing m