首页
登录
职称英语
According to the article, people named this stuff "flammable ice" because______
According to the article, people named this stuff "flammable ice" because______
游客
2025-01-25
9
管理
问题
According to the article, people named this stuff "flammable ice" because______ [br]
Buried below the seabed around Japan, there are beds of methane, trapped in molecular cages of ice. In some places, the sediment covering these deposits of frozen water and methane has been eroded away, leaving whitish mounts of what looks like dirty ice rearing up out of the seafloor.
Take a chunk of this stuff up to the surface and it looks and feels much like ice, except for a give-away fizzing sensation in the palm of your hand, but put a match to it and it doesn’t just melt, it ignites. Large international research programs and companies in Japan, among other countries, are racing to retrieve this strange, counter-intuitive substance — known as fiery ice — from beneath the seafloor to use its methane for fuel. If all goes to plan, they may even start extraction by the end of the next decade. But the journey so far has been far from smooth.
There’s no doubt that methane hydrates could offer a major source of fuel, with recent estimates suggesting they constitute about a third of the total carbon held in other fossil fuels such as oil, gas and coal. Several nations, notably Japan, want to extract it. It is not hard to find, often leaving a characteristic seismic signature that can be detected by research vessels. The problem is retrieving that gas and bringing it to the surface.
"One thing that’s clear is that we’re never going to go down and mine these icelike deposits, " says Carolyn Ruppel, who leads the US Geological Survey’s Gas Hydrates Project.
It all comes down to physics. Methane hydrates are simply too sensitive to pressure and temperature to simply dig up and haul to land. They form at typically several hundred metres beneath the seafloor at water depths of about 500 metres, where pressures are much higher than at the surface, and temperatures are close to 0°C. Take them out of these conditions, and they begin to break down before the methane can be harnessed. But there are other ways to do it.
选项
A、Subjective.
B、Positive.
C、Negative.
D、Biased.
答案
B
解析
态度观点判断题。根据原文最后一段“There’s no doubt that methane hydrates could offer a major source of fuel,with recent estimates suggesting they constitute about a third of the total carbon held in other fossil fuels such as oil,gas and coal”可知有大量的可燃冰储存量,这一事实表明可燃冰有很大的潜在价值,文章最后又说到“Take them out of these conditions,and they begin to break down before the methane can be harnessed.But there are other ways to do it”,由此可知作者对可燃冰的开采抱着积极的态度,答案选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3928645.html
相关试题推荐
Bettywasoffendedbecauseshefeltthatherfriendshadignoredherpurposefull
Smokeparticlesandotherairpollutantsareoftentrappedintheatmosphere,th
Somepeoplethinkmoreofanimalsthanwillofchildren.A、theyhaveB、theyhadC
Peoplewhosepropertyisstolenshouldreporttothepolice.A、hadstolenB、isbe
Somepeopleassociatemigrationmainlywithbirds.Birdsdotravelvastdist
Somepeopleassociatemigrationmainlywithbirds.Birdsdotravelvastdist
Somepeopleassociatemigrationmainlywithbirds.Birdsdotravelvastdist
Somepeopleassociatemigrationmainlywithbirds.Birdsdotravelvastdist
Somepeopleassociatemigrationmainlywithbirds.Birdsdotravelvastdist
Somepeopleassociatemigrationmainlywithbirds.Birdsdotravelvastdist
随机试题
Whenaconsumerfindsthatanitemsheorheboughtisinfaultyorin
Thelinkbetweenhealthandincomeseemsprettyuncontroversial.【C1】______al
电喇叭上共鸣片、膜片、衔铁及()刚性连为一体。A.上铁心 B.下铁心 C.
A.x轴 B.y轴 C.z轴 D.直线x=y=z
建筑施工企业管理人员安全生产考核包括全生产知识考核和()考核,A.安全生产技能
根据规模细分的各子市场中,商业银行应重点争取的客户群为( )。A.工业企业
小明用GoldWave软件截取一段背景音乐如下图所示,当前选定部分的音频长度为(
下列属于金融期货交易制度的有()。 ①.集中交易制度 ②.标准化的期货
关于判决和裁定,下列做法正确的是:() A.最高人民法院的判决和裁定是发生法
背景 某机电工程公司承接了一座110kV变电站建设项目,工期一年,时间紧、任务
最新回复
(
0
)