首页
登录
职称英语
Merchant and passenger ships are generally required to have a life preserver
Merchant and passenger ships are generally required to have a life preserver
游客
2023-07-16
14
管理
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 the United States’ 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(浮力) to support the wearer should be retained by the life preserver after 48 hours in the water, and it should be reliable even after a 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 that it is nearly impossible to get it on wrong. Catches, straps, and ties should he 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.
选项
A、the uses of life preservers
B、the design of life preservers
C、the materials for life preservers
D、the buoyancy of life preservers
答案
B
解析
文章主旨题。C项和D项都是对救生衣设计中设计材料的说明。A项为陷阱,指救生衣的用途,尽管开头提到,但范围不着边际。故只有B是正确选项。
转载请注明原文地址:https://tihaiku.com/zcyy/2840703.html
相关试题推荐
Indiansaregenerallyreligiousandfamilyoriented,andtheirlivesaredee
【B1】[br]【B16】A、SurprisinglyB、GenerallyC、ContrarilyD、UnfortunatelyDunfortun
【B1】[br]【B12】A、independentlyB、repeatedlyC、logicallyD、generallyA语义衔接题。句意见71
[originaltext]In1871thefirstpassengerelevatorswereusedinofficebui
[originaltext]In1871thefirstpassengerelevatorswereusedinofficebui
[originaltext]In1871thefirstpassengerelevatorswereusedinofficebui
Whenthepassengerwokeup,he______(发现自己躺在医院的病房里).foundhimselflyinginaho
【B1】[br]【B20】A、reachedB、grantedC、requiredD、askedC
Noneofthepassengers______(认领这只手提箱).claimedthesuitcase
Forthispart,youarerequiredtowriteacompositiononthetopicChoiceofFr
随机试题
GrandCanyonHowwastheGrandCanyonformed?Thetruth
EvelynCokespent20yearsasahomecareaidehelpingtheelderlyandthes
ReadingTipsI.Three【T1】______phasesofreading【T1】______—beforereading—
Cigarettesmokingkills.Thatweknow.So,manufacturersmade【B1】______cigar
《大型群众性活动安全管理条例》规定的“大型群众性活动即法人或者其他组织面向社会公
碱骨料反应是指粗细骨料中的二氧化硅与水泥中的碱性氧化物发生化学反应。()
(2019年真题)关于某基金代销机构制作基金宣传推介材料的审批报备流程,以下表述
卡托普利属于A.抗菌药 B.ACEI C.有酰胺结构的局麻药 D.β受体阻
境内上市公司所属企业到境外上市,其董事会应当作出决议并提请股东大会批准的事项有(
客户(含个人和机构)办理现金或转账取款时,可以直接从其存管账户中办理。()
最新回复
(
0
)