首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
Merchant and passenger ships are generally required to have a life preserver for every person aboard and, in many cases, a certa
Merchant and passenger ships are generally required to have a life preserver for every person aboard and, in many cases, a certa
admin
2014-06-25
84
问题
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 not be 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 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 in danger, nor so burdensome that it hinders a person in the water while trying to swim.
United States Coast Guard does NOT require the life preserver to the made______.
选项
A、with as few strings as possible
B、capable of being worn on both sides
C、according to each wearer’s size
D、comfortable and light to wear
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/aDUC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
(非英语专业学生做)(Para.1,Passage4)Cancerisamongthetopkillerdiseasesinoursocietytodayandscientistshavefoundoutthatst
Inaclassroominanycountry,theteacherteachesmorethanartorhistoryorlanguage.Heorsheteachessomethingbehindthe
MoviesarethemostpopularformofentertainmentformillionsofAmericans.Theygotothemoviestoescapetheirnormaleveryd
She______tohavelunchwithherfriend,sayingthatshewasn’tfeelingwell.
Thispartistotestyourabilityinpracticalwriting.Nowyouarerequiredtowriteacompositiononthetopic"TheAdaptatio
Forthispartyouareallowed30minutestowritecompositiononthetopicCheatingatExaminations.Youshouldwriteatleasta
Therearemorethan40universitiesinBritain—nearlytwiceasmanyasin1960.During1960seightcompletelynewonesmorefoun
HelpfulAdviceDarylreallyenjoyedgoingtoschool.However,hewisheditwouldstartafewhourslatereachday.Hereally
IwishBillwoulddriveustothetrainstationbuthehas______totakeusall.
Georgesaidthathe______.
随机试题
面部皮肤癌较多见的是
A.鼠疫和霍乱B.流行性感冒C.艾滋病D.肺炎E.肝癌我国法定传染病中甲类传染病包括
心尖搏动位于左锁骨中线外第6肋间,考虑为
墙下钢筋混凝土条形基础。基础剖面及土层分布如图5-12所示。每延米长度基础底面处,相应于正常使用极限状态下荷载效应的标准组合的平均压力值为300kN,土和基础的加权平均重度取20kN/m3,地基压力扩散角取θ=10°。问按地基承载力确定的条形基础宽度
合同当事人之间出现合同纠纷,要求仲裁机构仲裁,仲裁机构受理仲裁的前提是当事人提交( )。
某企业进行人力资源需求与供给预测。经过调查研究与分析,确认本企业的销售额(万元)和所需销售人员数量(人)成一元线性正相关关系,并根据过去10年的统计资料建立了一元线性回归预测模型y=a+bx,其中,x代表销售额,y代表销售人数,回归系数a=52,b=0.0
哺乳动物是脊椎动物中躯体结构、功能行为最为复杂的高级动物类群,下列不属于哺乳动物的是:
设f(x)连续,f(0)=1,则曲线y=∫0xf(x)dx在(0,0)处的切线方程是_________.
设f(x)∈C[a,b],在(a,b)内可导,f(a)=f(b)=1.证明:存在ξ,η∈(a,b),使得2e2ξ-η=(ea+eb)[f′(η)+f(η)].
powerless根据嘉宾观点“Weexperimentonanimalsbecausetheyarepowerlesstostopus,”可知答案是powerless。
最新回复
(
0
)