[人教课标版第九册语文第一单元课课练习题]读--悟--写 三级联动 理念下人教版小学语文第九册第一单元1《窃读记》练习题一、读拼音，写词语chǎo c i jǐn l n jī j p( ) ( ) ( ) ( )chōng z wū y n zhī chēn...+阅读
PASSAGE 51
Ulcers
Even though ulcers appear to run in families, lifestyle plays more of a role than geic factors in causing the illness, according to a report in the April 13th Journal of Internal Medicine. In particular, smoking and stress in men and the regular use of pain-releasing medicines in women were linked with an increased risk of developing an ulcer.
Overall, 61% of ulcer risk appears to be due to environmental factors, such as smoking, and the remaining 39% is due to genes according to Dr. Ismo Raiha of the University of Turky and colleagues at the University of Helsinki, Finland. Some researchers had suggested that families may spread Helicobacteria pylori, the bacteria that can cause ulcers. However, the new study suggests this is unlikely, according to the report.
Raiha and colleagues studied data from more than 13,000 pairs of twins "to examine the roles of geic and environmental factors in the origin of peptic ulcer disease," they explain. Both twins were more likely to develop an ulcer if the pair were geically the same as pared with a pair of fraternal twins, suggesting that there must be some geic susceptibility to ulcer development.
However, the risk was no greater in twins living together pared with twins living apart, suggesting that shared exposure to H. pylori was not to blame. "Environment effects were not due to factors shared by family members, and they were related to smoking and stress in men and the use of analgesics in women," the authors wrote. "The minor effects of shared environment to disease liability do not support the concept that the grouping of risk factors, such as H. pylori infection, would explain the geic factor of peptic ulcer disease," they concluded.
1. According to the passage, which of the following is a very likely cause of ulcer in men?
A) Smoking and stress.
B) Drinking and smoking.
C) Genes and children.
D) Use of a certain medicine.
2. What factors contribute to over half the ulcers?
A) Hereditary factors.
B) Economic factors.
C) Environmental factors.
D) Geic factors.
以下为关联文档：
苏教版三下语文《夏日田园杂兴》第二课时练习题【教学目标】1．熟记8个成语和记诵古诗《夏日田园杂兴》。2．学写毛笔字。【教学过程】一、学习读读背背△学习成语1．同学们，你们知道庐山云雾有什么特点？谁能用成语来形容？2．庐...
人教版下册期末练习题(满分100分 答卷时间60分钟)项目卷面分(2分) 合计题次二四六八十得分一、我会读拼音写汉字。[20分]li n x gān j ng r q ngh u zhǔ yǐ hu d ng xi měi二、拼一拼...
中班珠心算练习题1 6-2 2 2-2 -1 1（ ） （ ） （ ）7 8 41 -2 -1-2 -1 -2（ ） （ ） （ ）珠、心算加3、减3请你先用算盘进行珠算、然后利用脑算盘进行心算，再把所得的答案填写在括号里。一、10以内两个...
苏教版三下第一课时复习要点练习题课时数：总第 课时 教学时间： 月 日【教学目标】1．完成学用字词句的教学，将语文学习与社会生活相融洽。2．写好钢笔字，注意写好捺画。【教学过程】一、学习学用字词句1．（出示中国地...
大班知识反馈综合练习题本学期即将结束，各位家长朋友一定很关心宝宝的收获吧！在这半年里，我们除了帮宝宝培养良好的习惯外，还指导宝宝学习了一些儿歌、古诗、歌曲，还帮宝宝掌握了1-10的分成等等。下面的...
一级建造师机电安装练习题１Ｍ４２２１１２ 工程分包合同的管理规定（第七讲） 单项选择练习； １ （ ）是指虽然无合同和法律依据，承包方认为自己在施工中确实遭受到很大损失而向业主寻求优惠性质的额外付款． Ａ 合同外索赔 Ｂ 施工加...
一级建造师一级法规冲刺班练习题第八讲习题 1、按照一定的标准，划分上下级法院之间受理第一审民事案件的分工和权限是（ ）。 A、级别管辖 B、地域管辖 C、专属管辖 D、分级管辖 答案：A 解析：级别管辖，是指按照一定...
高一Unit13 Abraham Lincoln语法同步练习题词法同步[练习题] 1. Here are the things you must do when an earthquake _____. A. breaks out B. breaks away C. happened D. breaks down 2. We all consider Yang Ch...
如何进行练习题的设计，对书本上练习题的利用与设计（1）加入生活元素，激发学生学习兴趣，加强数学内容和学生生活的联系，让学生从生活中来，到生活中去，这是数学课程改革所倡导的重要理念之一。传统的数学往往强调知识的逻辑性、系统性，...
