第17题: [单项选择]能使补体灭活而抗体不灭活的温度和作用时间是() A. 37℃,1小时 B. 56℃,30分钟 C. 25℃,30分钟 D. 60℃,30分钟 E. 45℃,30分钟 参考答案:B 答案解析:补体的性质不稳定,56℃加热30分钟或者60℃3分钟灭活。抗体结构较为牢固,在此温度不会被灭活。
第21题: [单项选择]In foreign language teaching,the target language was interpreted as a system of rules to be observed in texts and sentences,and to be related to the first language ______ and meaning. A. words B. rules C. sentences D. context 参考答案:B
第32题: [单项选择]Passage 1
Questions 25 to 28 are based on the passage you have just heard. A. Begging food from the tourists. B. Attacking the tourists. C. Dropping wastes on the tourists. D. Making loud noise to disturb the tourists. 参考答案:C 答案解析:[听力原文]25-28
Italy ’ s capital Rome is a famous tourist attraction.but there are swarms 0f birds t
第33题:[单选题]地图三要素指的是 A. 地图比例尺、地图符号、地图投影 B. 地图比例尺、地图符号、图例 C. 地图符号、图例、地图投影 参考答案:A