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
It is only a shiny, yellow metal, but it is one of the most valuable metals on earth. Since the beginning of time, men have look
It is only a shiny, yellow metal, but it is one of the most valuable metals on earth. Since the beginning of time, men have look
admin
2012-06-02
75
问题
It is only a shiny, yellow metal, but it is one of the most valuable metals on earth. Since the beginning of time, men have looked for this extremely valuable item, gold.
Gold is soft and easy to form into different objects. If it gets wet, it does not rust like iron or other metals. Acids do not change it. One important reason that gold is so valuable is that it is scarce.
Due to its softness, gold must be combined with other metals to harden it and give it strength. By hardening gold, people can then make coins and jewelry with it. Metals commonly mixed with gold are nickel, platinum, and copper. Gold jewelry bears a number and the letter K. The K means karat(carat), which is a measure of the amount of pure gold in the jewelry. Pure gold is 24K. Therefore, a necklace which is 14K is fourteen parts gold and ten parts other metal.
Many countries utilize gold for certain coins, but this practice is not as common now as it once was. The United States, for instance, stopped making gold coins in 1933.
In order to make it stronger, gold is often mixed with______.
选项
A、hard gold
B、coin and jewelry
C、acids
D、other metals
答案
D
解析
细节题。问题问为了提高其强度,黄金常常和什么融合。要注意提问中的make itstronger的意思就是文章中的give it strength,只不过变了个说法而已。明白这一点之后,我们就可到文章中去寻找give it strength了,答案肯定在它附近。找到第三节的第三句,答案就有了。
转载请注明原文地址:https://kaotiyun.com/show/jaGC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
求
如果幂级数anxn的收敛半径为2,则幂级数nan(x一1)n-1的收敛区间为_________.
假设函数f(x)是周期为2的可导函数,则f'(x)的周期为_________.
Thiskindofmowingmachinediffersfromtheother______itismorepowerful.
Whichofthefollowingwouldbethebesttitleforthepassage?TheYMCAtrainingschoolofficialsaskedNaismithtoinventan
Theenergywhichthesunradiatesgoesineverydirection,andonlyaminutepartofitfallsontheearth.Evenso,itreprese
(英语专业必做)Nooneshouldbeforcedtowearauniformunderanycircumstance.Uniformsare【61】tothehumanspiritandtotally
Lettersofapologyshouldbewrittenandsent______.
这个沙发一拉开,就可变成床.(toconvertinto).
Thewind______thefallenleavesfromtheground.
随机试题
导致解释学“本体论转折”的是()
哮证发作期的主要病因病机是
患者,男,17岁。因左下肢疼痛2个月入院,查体:左小腿中段局部肿胀,组织增厚较硬,有压痛,局部皮温稍高。体温38.2℃,实验室检查:WBC:13.8×1012/L,N:78%;X线平片见下图。急性骨髓炎与尤因肉瘤有哪些主要的鉴别点
神经-肌肉接头处的化学递质是
WWW网是()的简称。
危险废物的特性不包括()。
2013年8月1日甲公司对外提供一项为期8个月的安装劳务,合同总收入580万元。2013年共发生劳务成本230万元,但无法可靠地估计该项劳务交易结果。若预计已发生的劳务成本能得到补偿的金额为150万元,则甲公司2013年度因该项业务应确认的收入为(
根据以下资料.回答问题。2000年、2005年、2006年发达国家、发展中国家和世界总体的国际储备(不包括黄金)和黄金储备变化情况,如图所示:2000年到2006年印度国际储备量的平均增长速度低于()。
Iwouldliketocallyouatthreethisafternoon,______?
ThepassagefocusesontheneedforAmericanstolearnforeignlanguages.Itispossibletoget______ofEsperantospeakersan
最新回复
(
0
)