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
外语
The most popular organic gem is the pearl. A pearl is the response of a marine mollusk to the presence of an irritating impurity
The most popular organic gem is the pearl. A pearl is the response of a marine mollusk to the presence of an irritating impurity
admin
2006-07-14
32
问题
The most popular organic gem is the pearl. A pearl is the response of a marine mollusk to the presence of an irritating impurity accidentally introduced into its body; a cultured pearl is the result of the intentional insertion of a mother-of-pearl bead into a live mollusk. Whether introduced accidentally or intentionally, the pearl-making process is the same: the mollusk coats the irritant with a substance called nacre. Nacre is composed chiefly of calcium carbonate. Because very few natural pearls are now on the market, most pearls used in fine jewelry are cultured. These include "Biwa" pearls and most other freshwater pearls. Cultured pearls are not easily distinguished from natural pearls except by an expert.
What is the chief component of nacre?
选项
A、Sand.
B、Bead.
C、Calcium carbonate.
D、Biwa.
答案
C
解析
见文章第四句:Nacre is composed chiefly of calcium carbonate.选项C.Calcium carbonate(碳酸钙)正确。
转载请注明原文地址:https://kaotiyun.com/show/FT5O777K
本试题收录于:
CATTI三级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI三级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
cheaper本题询问该维修工的优点。空格后有一个than,推测空格处应填入一个比较级。录音原文中指出该维修工收费比别人便宜(cheaper…thanotherpeople),因此空格处应填入cheaper。
Democraticgovernmentsconstantlyfacetheproblemofbalancing______theindividualwiththeneedsofsociety.
TheSt.LouisPost-Dispatch(was)foundedin1878(andby)1881(hadbecome)the(mostlargest)eveningnewspaperinthecity.
IndependentWritingDirectionsForthistask,youwillwriteanessayinresponsetoaquestionthatasksyoutostate,exp
WATERANDLIFEONMARS1Thepresenceorabsenceofwaterhasadirectbearingonthepossibilityoflifeonotherplanets.In
A、Classhasalreadystarted.B、Theyshouldstopthecarrightnow.C、Shedoesn’thaveenoughmoneytobuygas.D、Thisisn’tago
AgriculturaleconomistsdealAofproblemsrelatedBtoproducingandmarketingfarmproducts,andtheyprovidedataCaboutthefi
Exobiologyisthestudyoflife______otherplanets.
Texanshaveburstingprideandloveattention.Theyalsohaveathickstreakofshortsightedgreedand,evenbyAmericanstandar
随机试题
痰湿蕴肺证,咳嗽何时加重
下列各项,不属于妇科病因生活因素的是
药物变态反应的临床表现分为
屈赞与曲玲协议离婚并约定婚生子屈曲由屈赞抚养,另口头约定曲玲按其能力给付抚养费并可随时探望屈曲。对此,下列哪些选项是正确的?(2016年)
下列财产中,只能属于国家所有权客体的是()。
2004年10月29日,中国人民银行决定放开人民币存款利率的(),允许金融机构()存款利率。
下列对外来原始凭证错误更正的做法中,不违背《会计法》的是()。
当你觉得日子_________时,应设法改善工作方法或尝试新的工作,你也可以主动要求多承担一些责任,或者自己去充电。总之,要对自己的状态进行_________,发现工作中的乐趣。填入划横线部分最恰当的一项是:
我国首次实现月球软着陆和月面巡视勘察的探测器是()。
软件规划阶段实际上指的是______。A)需求获取和定义阶段B)数据获取和定义阶段C)测试用例设计规划阶段D)产品实施规划
最新回复
(
0
)