曰韩免费_91久久精品国产亚洲_一区二区成人影院_九一视频在线免费观看_91国视频_亚洲成人中文在线

大学英语六级阅读练习

雕龙文库 分享 时间: 收藏本文

大学英语六级阅读练习

  Merchant and passenger ships are generally required to have a life preserver for every person aboard and, in many cases, a certain percentage of smaller sizes for children. According to United States Coast Guard requirements, life preservers must be simple in design, reversible, capable of being quickly adjusted to fit the uninitiated individual, and must be so designed as to support the wearer in the water in an upright or slightly backward position.

  Sufficient buoyancy to support the wearer should be retained by the life preserver after 48 hour in the water, and it should be reliable even after long period of storage. Thus it should be made of materials resistant to sunlight, gasoline, and oils, and it should be not easily set on fire.

  The position in which the life preserver will support a person who jumps or falls into the water is most important, as is its tendency to turn the wearer in the water from a face-down position to an upright or slightly backward position, with his face clear of the water, even when the wearer is exhausted or unconscious.

  The method of adjustment to the body should be simple, and self-evident to uninitiated persons even in the dark under the confused conditions which follow a disaster. Thus, the life preserver should be reversible, so that it is nearly impossible to set it on wrong. Catches, straps, and ties should be kept to a minimum. In addition, the life preserver must be adjustable to the wide variety of shapes and sizes of wearers, since this greatly affects the position of floating and the self-righting qualities. A suitable life preserver should also be comfortable to wear at all times, in and out of the water, not so heavy as to encourage to take it off on shipboard while the ship is in danger, nor so burdensome that it hinders a person in the water while trying to swim.

  21.The passage is mainly about ________.

  A) the uses of life preservers

  B) the design of life preservers

  C) the materials for life preservers

  D) the buoyancy of life preservers

  22.According to the passage, a life preserver should be first of all, ________.

  A) adjustable

  B) comfortable

  C) self-evident

  D) self-righting

  23.United States Coast Guard does NOT require the life preserver to the made ________.

  A) with as few strings as possible

  B) capable of being worn on both sides

  C) according to each wearers size

  D) comfortable and light to wear

  24.By the uninitiated individual the author refers to the person ________.

  A) who has not been instructed how to use a life preserver

  B) who has a little experience in using a life preserver

  C) who uses a life preserver without permission

  D) who becomes nervous before a disaster

  25.What would happen if a person were supported by the life preserver in a wrong position?

  A) The waves would move him backwards.

  B) The water would choke him.

  C) He would immediately sink to the bottom.

  D) He would be exhausted or unconscious.

  参考答案:daadc

  

  Merchant and passenger ships are generally required to have a life preserver for every person aboard and, in many cases, a certain percentage of smaller sizes for children. According to United States Coast Guard requirements, life preservers must be simple in design, reversible, capable of being quickly adjusted to fit the uninitiated individual, and must be so designed as to support the wearer in the water in an upright or slightly backward position.

  Sufficient buoyancy to support the wearer should be retained by the life preserver after 48 hour in the water, and it should be reliable even after long period of storage. Thus it should be made of materials resistant to sunlight, gasoline, and oils, and it should be not easily set on fire.

  The position in which the life preserver will support a person who jumps or falls into the water is most important, as is its tendency to turn the wearer in the water from a face-down position to an upright or slightly backward position, with his face clear of the water, even when the wearer is exhausted or unconscious.

  The method of adjustment to the body should be simple, and self-evident to uninitiated persons even in the dark under the confused conditions which follow a disaster. Thus, the life preserver should be reversible, so that it is nearly impossible to set it on wrong. Catches, straps, and ties should be kept to a minimum. In addition, the life preserver must be adjustable to the wide variety of shapes and sizes of wearers, since this greatly affects the position of floating and the self-righting qualities. A suitable life preserver should also be comfortable to wear at all times, in and out of the water, not so heavy as to encourage to take it off on shipboard while the ship is in danger, nor so burdensome that it hinders a person in the water while trying to swim.

  21.The passage is mainly about ________.

  A) the uses of life preservers

  B) the design of life preservers

  C) the materials for life preservers

  D) the buoyancy of life preservers

  22.According to the passage, a life preserver should be first of all, ________.

  A) adjustable

  B) comfortable

  C) self-evident

  D) self-righting

  23.United States Coast Guard does NOT require the life preserver to the made ________.

  A) with as few strings as possible

  B) capable of being worn on both sides

  C) according to each wearers size

  D) comfortable and light to wear

  24.By the uninitiated individual the author refers to the person ________.

  A) who has not been instructed how to use a life preserver

  B) who has a little experience in using a life preserver

  C) who uses a life preserver without permission

  D) who becomes nervous before a disaster

  25.What would happen if a person were supported by the life preserver in a wrong position?

  A) The waves would move him backwards.

  B) The water would choke him.

  C) He would immediately sink to the bottom.

  D) He would be exhausted or unconscious.

  参考答案:daadc

  

主站蜘蛛池模板: 久久精品国产久精国产 | 久久香| 香蕉久久精品国产 | 国产精品成人在线 | 国产成人在线视频免费观看 | 国产成人免费永久播放视频平台 | 亚洲色欲一区二区三区在线观看 | 99国产精品免费视频观看 | 亚洲国产婷婷综合在线精品 | 久久99热精品免费观看动漫 | 狠狠色噜噜狠狠狠8888米奇 | 亚洲图片综合区 | 国产av亚洲精品久久久久 | 国产成人精品无码一区二区三区 | 国产成人精品一区 | 天天爽夜夜爽夜夜爽精品视频 | 中国一级毛片视频免费看 | 两个人看的www视频日本 | 女狠狠噜天天噜日日噜 | 亚洲精品成人av观看 | 成人午夜网址 | 精品国产区 | 特级黄色网| 97国产在线视频 | 久久一区二区三区99 | 中文字幕在线日韩 | 青青福利视频 | 中文字幕精品视频在线观 | 三级做爰蜜桃成熟时在线观看 | 自拍偷拍视频网 | 一区二区三区四区在线不卡高清 | 玖玖色资源网 | 精品免费国产一区二区 | 免费看av在线网站网址 | 色综合网天天综合色中文男男 | 国产专区欧美 | 熟妇高潮一区二区三区 | 你懂的在线网址 | 五月综合视频 | 日本亚洲精品色婷婷在线影院 | 丰满少妇被猛烈进av毛片 |