第7题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. The class thought the demonstration was too complex. B. Too many students showed up. C. The professor didn’t show up. D. The professor cancelled it. 参考答案:D 答案解析:[听力原文] M: Why didn’t you have your astronomy class today W: Only five out of a class of twent
第8题: [单项选择]不属于重度眼外伤的是() A. 眼睑广泛撕脱和缺损 B. 眼睑Ⅱ度烧伤 C. 眼内异物 D. 眼球钝挫伤合并眼内出血 E. 眼球贯通伤 参考答案:B 答案解析:该题是基础理论记忆题,备选答案是眼外伤中、重度损伤的临床描述。中度伤:包括眼睑及泪小管撕裂伤、眼睑Ⅱ度烧伤、球结膜撕裂伤、角膜浅层异物等。重伤:包括眼睑广泛撕脱和缺损、眼睑Ⅲ度烧伤、眼球贯通伤、眼内异
第11题:[多选题]气相色谱内标法定量时对内标物的要求 ( ) A. 内标物应是试样中不存在的纯物质 B. 内标物的性质应与待测组分性质相近 C. 内标物与样品互溶,但不能发生化学反应 D. 内标物加入量应接近待测组分含量 E. 内标物的色谱峰与待测组分的色谱峰靠近并与之完全分离 参考答案:ABCDE