查看汇总:
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
国内英语资讯:Concern over safety in China unnecessary: FM spokesperson
特朗普对美朝二次峰会感到乐观
体坛英语资讯:Thailand wins both singles titles at Asian Sepak Takraw Championship
体坛英语资讯:World champion to vie in World Motocross Grand Prix 2019 in Indonesia
国际英语资讯:U.S. national zoo holds housewarming event inside giant panda house
国际英语资讯:Maduro vows to defend Venezuela as countries reiterate support
娱乐英语资讯:Classic Rossini opera performed at NCPA
国际英语资讯:Belt and Road Initiative brings new opportunities for Nepal: former Nepali PM
国内英语资讯:Chinese president meets Saudi crown prince
国际英语资讯:Fed Chairman Powell highlights patience in monetary policy as he testifies before Congress
My Dream 我的梦想
国际英语资讯:Trump arrives in Hanoi for 2nd DPRK-U.S. summit
国内英语资讯:China Focus: China issues plans to modernize education
国内英语资讯:China Focus: Economic Corridor to benefit people of China, Myanmar
国际英语资讯:Putin salutes fallen soldiers on Defender of Fatherland Day
国际英语资讯:Spotlight: Measles cases rise in Turkey amid anti-vaccination sentiment
国际英语资讯:Four dead, several injured as gale-force winds batter Italy
国内英语资讯:China, Canada to launch television festival in Toronto
国际英语资讯:Feature: Crisis-hit Greek antique artworks dealers welcome recovery, hope for better days
国内英语资讯:DPPs pressure on reunification supporters against historical trend: spokesperson
体坛英语资讯:Forward Morris ready to help Thunder
国内英语资讯:Beijing to open service sector wider
周末晚睡真的很糟糕吗?
国内英语资讯:China to further enhance physical education in primary, secondary schools
体坛英语资讯:Barca looking to end away day problems as Real Madrid visit Levante in Matchday 25
国际英语资讯:UN food agency revisits Yemen wheat silos after months of suspension
国内英语资讯:Vice premier stresses solid preparations for 2nd import expo
体坛英语资讯:Craven-led Namibian team NCCS to compete in South African cycling tours
体坛英语资讯:Bremen tie struggling Stuttgart 1-1 in German Bundesliga
体坛英语资讯:Pizjuan Stadium first destination in the long week for Barca
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |