15.A hole at the bottom of a ship will allow water to flood into the hull(船体),causing it to sink.But believe it or not,most large ships sailing over the deep ocean waters actually have one or more good-sized holes at their bottom!These holes have been given a rather fanciful name-moon pool.A moon pool is basically an opening located at the floor or the hull of a sailing ship,which is used for gaining easier and safer access to the water below.
Above Sea Level
This is the first and most basic type of the moon pool.It is located within a sailing ship,inside a chamber(船舱) that is built above sea level.This chamber is constructed such that it is easily accessible via hallways and stairways,inside the sailing shup.This type usually requires ships to have a twin-hull design,and is most commonly found on oil drilling platforms.
At Sea Level
This type is found in ships with a single hull design.In these ships,the hull is well below sea level,which causes the water to rise up inside the opening of the moon pool,making it seem there is a swimming pool.To prevent the rising water from flooding the hull and sinking the ship,the sides of the moon pool are designed such that they rise up higher than water level in the pool,containing an overflow(溢流管).This type also has doors present inside the hull.The openings to the moon pool can be closed by shutting the doors.
Below Sea Level
This type of moon pool is present below sea level.The chamber housing the moon pool is made completely airtight(不透气的) with a two-door mechanism.The first door opens to the hull while the second one opens to the sea water.When a diver wants to enter the water,he will enter into the middle chamber through the first door,while the second one is kept locked.Once the dive is inside the chamber,the first door is locked.Then the second door is opened and the diver is able to enter the water.To get back in,he will need to get into the chamber through the second door while the first remains locked.Once he is inside the chamber,the second door is closed,and the water in the chamber is pumped out before the first door is opened. In Submerged Habitats(水下居住舱)
This type is usually found in deep underwater habitats,which are made completely airtight and filled with air up to normal atmospheric pressure.The moon pool provides the only way to enter or exit from these habitats.The entry and exit mechanism is similar to the one used by the below sea level type of moon pools.
59.A moon pool on an oil drilling platformC.
A.has doors present inside the platform
B.looks like a swimming pool in the platform
C.is easy to access through hallways and stairways
D.has higher sides than water level in the pool
60.Moon pools in ships with a single hull design are often builtB.
A.above sea level B.at sea level C.below sea level D.in submerged habitats
61.What is the right procedure for getting back in the hull through the moon pool below sea level?D
a.Open the first door.b.Pump the water put.
c.Close the second door.d.Enter the secong door.
A.d,b,c,a B.d,a,b,c C.a,b,d,c D.d,c,b,a.
分析 本文主要讲述了各种大型船体上设计的各种moon pool.
解答 59.C细节理解题.根据文章第二段第三句"This chamber is constructed such that it is easily accessible via hallways and stairways,inside the sailing shup."可知石油钻井平台上的 moon pool可以很容易通过走廊和楼梯访问.故选C.
60.B细节理解题.根据文章第三段可知在单一的船体上moon pool设计在海平面以上,防止水位上升淹没下沉的船体.故选B.
61.D细节理解题.根据第四段可知海平面以下的船体设计是有两个moon pool,通过moon pool要回到船体必须要先进入第二门然后关闭第二道门其次要水泵放水打开第一道门.故选D.
点评 本文是广告布告类阅读理解.做这类题材阅读理解时要求考生对文章通读一遍,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据