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当前学科：预防医学
题目：
某研究室用甲乙两种血清学方法检查410例确诊的鼻咽癌患者，得结果如表，问两种检验结果之间有无差别?两种血清学检验结果甲法乙法合计+ －+ 261 110 371 －8 31 39 合计269 141 410
答案：
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答：HO：两法检验结果无关系。HI：两法.....
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翻译篇章If you intend using humor in your talk to make people smile, you must know how to identify shared experiencesand problems. Your humor must be relevant to the audience andshould help to show them that you are one of them or that you understand their situation and are in sympathy with their point of view. Depending on whom you are addressing, the problems will be different. If you are talking to a group of managers, you may refer to the disorganizedmethods of their secretaries; alternatively if you are addressing secretaries, you may want to comment on their disorganized bosses.Here is an example, which Iheard at a nurses’convention, of story which works well because the audience all share thesame view of doctors. A man arrives in heaven and is being shown around by St. Peter. He sees wonderful accommodations, beautiful gardens, sunny weather, and so on. Everyone is very peaceful, polite and friendly until, waiting in a line for lunch, the new arrival is suddenly pushedaside by a man in a white coat, who rushes to the head of the line, grabs his food and stomps over to a table by himself. “Who is that?”the new arrival asked St. Peter. “Oh, that’s God,”came the reply, “but sometimes he thinks he’s a doctor.”If you are part of the group which you are addressing, you will be in a position to knowthe experiences andproblems which are common to all of you and it’ll be appropriate for you to make a passing remark about the inedible canteen food or the chairman’s notorious bad taste in ties. With other audiences you mustn’t attempt to cut in with humor as they will resent an outsider makingdisparaging remarks about their canteen or their chairman. You will be on safer ground if you stick to scapegoats like the Post Office or the telephone system.If you feel awkward being humorous, you must practice so that it becomes more natural. Include a few casual and apparently off-the-cuff remarks which you can deliver in a relaxed and unforced manner. Often it’s the delivery which causes the audience to smile, so speak slowly and remember that a raised eyebrow or an unbelieving look may help to show that you are making a light-hearted remark.Look for the humor. It often comes from the unexpected. A twist on a familiar quote “If at first you don’t succeed, give up”or a play on words or on a situation. Search for exaggeration and understatements. Look at your talk and pick out a few words or sentences which you can turn about and inject with humor.
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Directions: Write a letter of thanks by using the information given below.以 Mary 的名义给Rose写一封感谢信，内容如下：1. 感谢你的好朋友Rose在你生日聚会时送给你一个音乐盒（music box）作为生日礼物；2. 你早就想买一个音乐盒来听音乐，可是价钱有点贵，一直没能买。Rose买这个音乐盒肯定花了她几个星期的积蓄。你很喜欢这个音乐盒；3. 再次向她表达感谢，这是你收到的最好的生日礼物。
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