[考研类试卷]考研英语(阅读)模拟试卷227及答案与解析.doc
《[考研类试卷]考研英语(阅读)模拟试卷227及答案与解析.doc》由会员分享,可在线阅读,更多相关《[考研类试卷]考研英语(阅读)模拟试卷227及答案与解析.doc(17页珍藏版)》请在麦多课文档分享上搜索。
1、考研英语(阅读)模拟试卷 227 及答案与解析Part ADirections: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)0 For 10 years I have been teaching animal behavior and conservation biology at the Boulder County Jail in Colorado. The coursepart of the Jane Goodall In
2、stitutes Roots the second were 54 of their healthy siblings (brothers or sisters); and a further 24 were children without diabetes who were not related to anyone else in the study. The researchers then compared DNA from the mothers and their children.Because mothers pass copies of about half their g
3、enes to their children, some genes in any child-mother pairs will be unique to the motherthose that the child has not inherited from her. Othersversions of genes that came from dadwill be unique to the child. Dr Nelson used the uniquely maternal genes to find mothers cells in the volunteers blood. T
4、he technique found maternal cells in about half the diabetics samples, but in only about one-third of the healthy siblings samples and in less than one-fifth of those from the unrelated volunteers. Moreover, the microchimerism was not only more common but also more pronounced in diabetics.Dr Nelson
5、also looked for signs that the maternal cells had caused the diabetes but found no evidence. So, contrary to established opinion, she believes maternal cells can do children good. These cells may help any bodily organ work better, she says, apart from the reproductive kind. Mothers protective interf
6、erence goes onseen and unseen.21 “Microchimerism“ refers to a form of maternal interference in which mothers _.(A)keep telling their children what they should eat all day long(B) help sick children with their own cells left inside childrens bodies(C) interfere with childrens lives in an all-round wa
7、y(D)leave all of their own cells, good or bad, inside their childrens bodies22 It is stated in Paragraph 2 that microchimerism could_.(A)only be detected in people with autoimmune conditions(B) be found in people of all ages and of all races(C) also be found in people who enjoy good health(D)be dete
8、cted in people with all unhealthy conditions23 Some genes in child-mother pairs will be unique to the mother in that _.(A)these genes havent been passed to the child(B) less than half of the genes have been passed to the child(C) these genes come from the father(D)the child is not willing to inherit
9、 these genes24 According to Dr Nelson in the last paragraph, maternal cells would _.(A)lead to the diabetes(B) trigger various diseases(C) exert positive impact on children(D)harm rather than help25 What is the authors attitude towards maternal interference?(A)Supportive.(B) Biased.(C) Impartial.(D)
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
2000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 考研 试卷 英语 阅读 模拟 227 答案 解析 DOC
