英语学习资料：2014年6月六级阅读理解习题： Merchant 以下文字资料是由小编为大家搜集整理后发布的内容，让我们赶快一起来看一下吧！
2014年6月六级阅读理解习题： Merchant
Merchant and passenger ships are generally required to have a life preserver for every personaboard and, in many cases, a certain percentage of smaller sizes for children. According to United StatesCoast Guard requirements, life preservers must be simple in design, reversible, capable ofbeing quickly adjusted to fit the uninitiated individual, and must be so designed as to supportthe 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 preserverafter 48 hour in the water, and it should be reliable even after long period of storage. Thus itshould be made of materials resistant to sunlight, gasoline, and oils, and it should be noteasily set on fire.
The position in which the life preserver will support a person who jumps or falls into thewater is most important, as is its tendency to turn the wearer in the water from a face-downposition to an upright or slightly backward position, with his face clear of the water, evenwhen the wearer is exhausted or unconscious.
The method of adjustment to the body should be simple, and self-evident to uninitiatedpersons even in the dark under the confused conditions which follow a disaster. Thus, the lifepreserver 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 beadjustable to the wide variety of shapes and sizes of wearers, since this greatly affects theposition of floating and the self-righting qualities. A suitable life preserver should also befortable to wear at all times, in and out of the water, not so heavy as to encourage to takeit off on shipboard while the ship is in danger, nor so burdensome that it hinders a person inthe 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) fortable
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 wearer’s size
D) fortable and light to wear
24.By “the uninitiated individual” (Para. 1, line 6) 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 bees nervous before a disaster
25.What would happen if a person were supported by the life preserver in a wrongposition?
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.
英语学习资料：2014年6月六级阅读理解习题： Merchant
