引起医院内肺炎的致病原大多是()A．革兰氏阳性菌 B．革兰氏阴性菌 C．真菌 D．病 发布时间：2017-12-13 00:37 │ 来源：www.tikuol.com 题型：单项选择题 问题： 引起医院内肺炎的致病原大多是()A．革兰氏阳性菌B．革兰氏阴性菌C．真菌D．病毒E．以上都是
题型：单项选择题 选用方框内的句子补全对话，其中有两项是多余的。A. Did she see the doctor? B. How does she feel? C. Where is she now? D. I'm sorry to hear that.E. What's the matter with her? F. Does she have a headache?G. Does she have a toothache?Teacher: Lily is not in the class. 1___________Sarah: She is at home. Teacher: 2___________ Sarah: She is sick. She has a cold. Teacher: 3___________ Sarah: Yes, she has a headache. Teacher: 4___________Sarah: Yes, she did. And the doctor asked her to take some medicine and stay in bed for one day. Teacher: 5___________ I hope she will be better soon. 查看答案
题型：单项选择题 学会用化学解决生活问题是学习化学的一项重要任务。下列物质鉴别方法错误的一组是[ ]A.白酒和白醋--闻气味 B.软水和硬水--肥皂水C.N2和CO2--燃着的木条 D.空气和氧气--带火星的木条 查看答案