Question

阅读理解 　　Intensive treatment of gum(齿龈)disease may lead to improved blood flow and significantly reduced inflammation(炎症)in the body, a new study reports． 　　Previous studies had come to similar conclusions, but this was the first clinical trial, the researchers said． 　　The researchers randomly(随便地)assigned 120 people with severe gum disease and no other chronic(慢性的)infections to ordinary care or intensive periodontal(牙齿周围的)treatment．Then they measured blood vessel elasticity, a test of blood flow efficiency, at one, two and six months afterward． 　　At first, the blood flow efficiency declined in the periodontal group．But it improved significantly compared with the other group when tested two and six months later． 　　There were no significant differences between the groups in such heart disease risk factors as levels of high-density or low-density lipoproteins, total cholesterol or blood levels of C-reactive protein．The study, published March 1 in The New england Journal of Medicine, included only people with severe gum disease, and the authors wrote that it was not clear that similar improvements in vascular(脉管的)function would be seen in people with less serious periodontal problems． 　　Maurizio S．Tonetti, the study's lead author, explained in an interview that gum disease, along with other chronic inflammation, might contribute to atherosclerosis, or hardening of the arteries(动脉)．Dr．Tonetti is the executive director of the European Research Group on Periodontology． 　　“People should not think that this is the cause of heart attacks,” he said．“It's one of many things that can contribute．But investing in oral health, both in terms of prevention and treatment, may not only be good for your smile and chewing, but for your overall health as well．” (1) According to the passage, the blood flow efficiency declined ________． [　　] A． in the periodontal group a month later B． in the periodontal group after two months C． in the ordinary care group two months afterward D． in the ordinary care group six months later (2) Which of the following statements is true? [　　] A． The passage talks about a new conclusion in Periodontology． B． Gum disease is one of the causes of atherosclerosis． C． The 120 people randomly assigned were patients with other chronic inflammation． D． Improvements in vascular function might not be seen in people with less serious periodontal problems． (3) From the passage we can infer that most people invest in oral health for the purpose of ________． [　　] A． improvements in vascular function B． better appearance or chewing function of their teeth C． their overall health D． prevention of heart attacks (4) What does the passage really talk about? [　　] A． Treating gum disease may ease other illnesses． B． Going to dentists is always necessary． C． Medical conclusions should be tried out clinically． D． Gum disease contributes to heart attacks．

Answer 1

答案：1．A;2．D;3．B;4．A;
解析：

(1)	考查细节理解题。根据文章第四段的第一句话可知。
(2)	考查细节理解题。根据第一段可知A不正确；根据文章倒数二段的第一句话中along with other chronic inflammation，可知B不正确；根据文章第三段中第一行中with no other chronic(慢性的)infections可知C不正确；根据倒数第三段的最后一句话可以得知D正确。需要注意D项中might not表示推测语气，语气最弱，和文中it was not clear照应。
(3)	考查判断推理题。根据文章最后一段中最后一句话可以判断出一般人们是为了smiling and chewing。
(4)	解析：考查主旨大意题。本文的中心段是第一段，根据其意可以得知A正确。 　　文章大意：一项新的临床实验表明对牙龈疾病的集中治疗有助于改善血流并且能明显减轻身体炎症。