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
2015-05-14
28
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.
If a ring is marked 12K, then the percentage of gold in it is______.
选项
A、12
B、50
C、25
D、24
答案
B
解析
推断判断题。题干大意为:一枚戒指标为12K,那么它的黄金含量是。文中第三段的倒数第二行说到纯金为24K,我们不难算出其黄金含量是12/24,换算一下,即50%,故选B。
转载请注明原文地址:https://kaotiyun.com/show/abTC777K
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
Thereisabeautifulpositivecyclethatiscreatedbylivingalifeofhonorableactions.Honorablethoughtsleadtohonorable
______manypeoplecametothemeetingthattherewerenotenoughseatsforeveryone.
DoesCharacterMatter?Doesthepersonalbehaviorofapublicofficial,especiallyournation’s【1】official,reallymakeadi
DoesCharacterMatter?Doesthepersonalbehaviorofapublicofficial,especiallyournation’s【1】official,reallymakeadi
Teachinginvolvesmorethanleadership.Someoftheteacher’stimeandeffortisdirectedtowardinstruction,sometowardevalua
Itisonlyashiny,yellowmetal,butitisoneofthemostvaluablemetalsonearth.Sincethebeginningoftime,menhavelook
Inrecentyearsanumberofcommunicationsatellites______intoorbitabouttheearth.
Itwasn’tsuchagooddinner______shehadpromisedus.
Thebully’sthreateningremarksfrightenedthechild______.
Thebully’sthreateningremarksfrightenedthechild______.
随机试题
在下列配送方式中,服务水平最高的一种配送方式是()
阅读《寡人之于国也》中的一段文字,然后回答下列小题。“狗彘食人食而不知检,涂有饿莩而不知发;人死,则曰:‘非我也,岁也。’是何异于刺人而杀之,曰:‘非我也,兵也?’王无罪岁。斯天下之民至焉。”从这段话中可以看出实行王道应持有的正确态度是什么?
癌基因活化的机制是
早失后造成继承牙萌出困难最多的乳牙是
在审判阶段,可以接受人民法院指定担任辩护人的只能是( )。
解决合同及其他纠纷的主要方法是()。
永佃权
专制型教师对学生可能产生()等影响。
钱穆先生曾说:“做学问可训练做人。”初听不免令人困惑,“做学问”是少数人从事的职业,并非人人可为,更非人人必为,除了享受其研究成果,可谓与大多数人的生活毫无干系。不过,若我们把思路放开,钱先生此言也不难理解。这里的关键在“训练”二字:治学的道理、方法,许多
甲、乙两队同学去植树,甲队有一人植树6棵,其余每人都植树13棵;乙队有一人植树5棵,其余每人都植树10棵。已知两队植树棵数相等,且每队植树的棵数大于100而不超过200,那么甲、乙两队共有多少人?
最新回复
(
0
)