首页
登录
职称英语
What makes shipwreck diving appealing is also what makes it so dangerous. Wr
What makes shipwreck diving appealing is also what makes it so dangerous. Wr
游客
2023-07-22
41
管理
问题
What makes shipwreck diving appealing is also what makes it so dangerous. Wrecks, for example, can sink to extreme depths. The Andrea Doria is known as the "Mt. Everest of diving" partly because it’s an intimidating 180 feet below the water’s surface. And that’s only to the top of the wreck.
At such depths, breathing gets very complicated. Unlike on Everest, where oxygen levels are thin, the weight of water at more than 20 feet deep compresses the oxygen that divers breathe. That oxygen density, in turn, wreaks havoc(破坏)on the human nervous system and can lead to unconsciousness and eventually death.
Nitrogen also takes on deadly traits underwater. Again, the weight of water is about 64 pounds per cubic foot is what transforms this otherwise harmless gas. As a diver plunges deeper underwater, excess nitrogen is compressed in the bloodstream. If divers rise too fast to the surface, the compressed nitrogen expands and can fizz out of the bloodstream, entering the spinal column and causing an extremely painful and sometimes deadly condition known as the bends.
Nitrogen’s other underwater effect is a little more pleasant, but equally lethal. It is called the whiskey factor, at every 50 feet of depth it’s like taking a shot of whiskey. While an alcoholic buzz may be an appealing sensation on land, losing your senses underwater can lead to fatal accidents. And shipwrecks hold plenty of potential for accidents. Underwater wrecks are nothing more than a tangle of lines and rotting structures that present a deadly maze(迷宫)to divers.
One device divers use to avoid getting snared or disoriented in a wreck is a guideline, or coiled string, that they tie along their path. Like a trail of breadcrumbs, the guidelines allow them to retrace their route. Despite such precautions, the captivating(迷人的)underwater world of a shipwreck can make even the best divers lose focus.
Equipment in the sport as a whole has also seen great advances in recent years. In the late 1980s introduced wristwatch-sized diving computers that tell divers when it’s time to surface and at what rate, better dry suits that keep the body warmer at chilled depths and mixed gasses that replaced compressed air to make the sport less risky. [br] This passage is written mostly probably for those ______.
选项
A、taking wreck diving as a sport
B、specializing in wreck research
C、focusing on shipwreck archaeology
D、interested in marine medical science
答案
A
解析
综合判断。从文章开始说沉船潜水既迷人又危险,到最后一段说这项运动的设备近年来总体上有巨大的提高,可以看出沉船研究、沉船考古、或海洋医学都不太合适,只有选项A)最好。
转载请注明原文地址:http://tihaiku.com/zcyy/2859592.html
相关试题推荐
Whatmakesshipwreckdivingappealingisalsowhatmakesitsodangerous.Wr
Whatmakesshipwreckdivingappealingisalsowhatmakesitsodangerous.Wr
Whatmakesshipwreckdivingappealingisalsowhatmakesitsodangerous.Wr
Whatmakesshipwreckdivingappealingisalsowhatmakesitsodangerous.Wr
Whatmakesshipwreckdivingappealingisalsowhatmakesitsodangerous.Wr
随机试题
Whenhewaseighteen,hebecameaPartymember.At____________ofeighteen,he
Whatisscientists’aimofdrillingavolcano?[br][originaltext]16.Scientist
马歇尔稳定度试验过程的主要控制因素有()。A.试验温度 B.试件尺寸
能力验证用的样品应进行均匀性和稳定性分析。
为预测我国居民家庭对电力的需求量,建立了我国居民家庭电力消耗量(单位:千瓦小时)
最早提出用大剂红花、桃仁、降香及失笑散治疗死血心痛的医家是A.孙思邈 B.危亦
对AMY描述错误的是A.主要有胰淀粉酶和唾液淀粉酶两种同工酶B.氯离子对其有激活
从以下图形序列中将哪一个去掉后剩下的图形可以呈现出一定的规律性?()
我国邮政金融业务主要包括负债业务、中间业务和资产业务,下列业务中,属于资产业务的
某发电厂装有二台300MW机组,经主变升压至220KV接入系统。220KV屋外配
最新回复
(
0
)