In the early days of a travel, amen on long voyages lived exclusively on sa

题文

In the early days of a travel, amen on long voyages lived exclusively on salted meat and biscuits. Many of them died of scurvy (坏血病), a dia of the blood which caus swollen gums, livid white spots on the flesh and general exhaustion. On one occasion, in 1535, an English ship arrived in Newfoundland with its crew desperately ill. The men´s lives were saved by Iroquois Indians who gave them vegetable leaves to eat. Gradually it came to be realized that scurvy was caud by some lack in the sailors´ diet and Captain Cook, on his long voyages of discovery to Australia and New Zealand, established the fact that scurvy could be warded off by the provision of fresh fruit for the sailors. Nowadays it is understood that a diet which contains nothing harmful may yet result in rious dia if certain important elements are missing. The elements are called “vitamins”. Quite a number of such substances are known and they are given letters to identify them, A, B, C, D, and so on. Different dias are associated with deficiencies of particular vitamins. Even a slight lack of Vitamin C, for example, the vitamin most plentiful in fresh fruit and vegetables, is thought to increa significantly our susceptibility (敏感度) to colds and influenza.The vitamins necessary for a healthy body are normally supplied by a good mixed diet, including a variety of fruit and green vegetables. It is only when people try to live on a very restricted diet, say during extended periods of religious fasting (斋戒), or when trying to lo weight, that it is necessary to make special provision to supply the missing vitamins.51. Scurvy is a dia that is provoked by ____A. salted meat and biscuits  B. exhaustion C. want of some esntial substances  D. lack of fresh vegetables and fruits52. In the last ntence of Paragraph 1, “warded off” could probably be replaced by____. A. got rid of B. killed C. avoided D. cleared away53. To avoid such dia as scurvy, it´s better for us ____.A. not to eat much salted meatB. to supplement our diet with various vitamin pillsC. to have more fresh fruit and vegetablesD. to develop a good dietary habit54. bad on the passage we can safely conclude that if our diet is not comprehensive enough ____.A. vitamin pills are of no availB. nutritious food might be unhealthyC. vegetable leaves can be a good remedyD. religious fasting may help out a lot55. Which of the following ntences best express the central ideal of the passage?A. Deficiencies of Vitamin C may cau rious dias. B. Fresh fruit and green vegetables contain enough nutrition that is necessary for a healthy body. C. Vitamins play a vitally important role in people´s health. D. A good mixed diet normally supplies sufficient vitamins for us. 题型：未知难度：其他题型

答案

小题1:C小题2:C小题3:D小题4:B小题5:C

解析

 

考点

据考高分专家说，试题“ In the early days o.....”主要考查你对 [健康环保类阅读 ]考点的理解。 健康环保类阅读

健康环保累阅读概念：

健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。

健康环保类文章阅读技巧：

   健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：   第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；   第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；   第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。   从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。【阅读策略】 1、概要(Summarizing)：  阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。 2、组织(Organization)：  阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。