首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
Magnesium is another mineral we now obtain by collecting huge volumes of ocean water and treating it with chemicals. Although or
Magnesium is another mineral we now obtain by collecting huge volumes of ocean water and treating it with chemicals. Although or
admin
2011-04-26
46
问题
Magnesium is another mineral we now obtain by collecting huge volumes of ocean water and treating it with chemicals. Although originally it was derived only from brines or from the treatment of such magnesium-containing rocks as dolomite, of which whole mountain ranges are composed. In a cubic mile of sea water there are about four million tons of magnesium. Since the direct extraction method was developed about 1941, production has increased enormously. It was magnesium from sea that made possible the wartime growth of the aviation industry, for every, air plane made in the United States (and in most other countries as well) contains about haft a ton of magnesium metal. And it has innumerable uses in other industries where a lightweight metal is desired, besides its long-standing utility as an insulating material, and its use in printing inks, medicines, and toothpaste.
According to the passage, why is magnesium important to industry?
选项
A、It is strong.
B、It conducts heat well.
C、It weighs little.
D、It is inexpensive to produce.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/qgqC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Scientistssayitmaybetenyears______thismedicinewasputtouse.
He______hismother’sbadtemper______illhealth.
Thisstorymentionscollegegraduatesat_______.RyanStewart_______.
Weshoulddoeverythingpossibletoclearupthemany______(understand)betweenus.
Childrenwhoareoverprotectedbytheirparentsmaybecome______.
Heseemedtobelookingforwordsathisdesk______toconveyhismeaningaspreciselyasIhaddone.
(Therearesigns)thatcomputerswillbebecomingmoreandmorepopularinordinaryfamilies.
______sheisalikeablegirl,sheisverydifficulttoworkwith.
Thispassageisabout______.Wecanconcludethataccidentsinvolvingcars______.
Themilkboiledoverandtherewasa______smellofburning.
随机试题
关税待遇
关于边缘性颌骨骨髓炎哪项是错误的
一名溺水游客被救出水后,神志不清,呼吸停止,口唇发绀,行口对口人工呼吸的先决条件是
可用于胆石症的药物为
患者,女性,19岁。从高处坠落,臀部着地致胸12、腰2椎体压缩性骨折。导致骨折的原因是
2017年3月,上海市统计局公布了2016年上海市居民消费购买力为800亿元,其中国产手机在消费品中的比重为5‰,国产手机的平均价格为2500元/台。预计在今后三年内无大的变动,居民消费品购买力在今后三年(2017年、2018年、2019年)每年递增3%,
某省新成立的规划设计单位,拟申请暂定乙级设计资质,应由()。
假设价值1000元资产组合中有三个资产,其中资产X的价值是300元,期望收益率是9%,资产Y的价值是400元,期望收益率是:12%,资产Z的价值是300元,期望收益率是15%,则该资产组合的期望收益率是()。
野生动物保护机构考查某圈养动物的状态,在n(n为正整数)天中观察到:①有7个不活跃日(一天中有出现不活跃的情况);②有5个下午活跃;③有6个上午活跃;④当下午不活跃时,上午必活跃。则n等于()。
假设有一Excel工作表,在A1单元格输入“1 1/2”(只输入双引号之内的内容,注意有空格),在A2单元格输入“2 1/2”,则MAX(A1,A2)的结果是(57)。
最新回复
(
0
)