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
A、Because they have a smooth surface. B、Because they are very expensive. C、Because they are very hard. D、Because they turn very
A、Because they have a smooth surface. B、Because they are very expensive. C、Because they are very hard. D、Because they turn very
admin
2010-01-10
40
问题
Watches, which ore really small clocks, were first made during the sixteenth century. The earliest watches were made of heavy iron, and people wore them hanging from their belts. Little by little, watches were made smaller so that they could be carried more easily. The invention of the machinery for the mass production of these parts of clocks and watches was an important step in making clocks and watches available to the general public. In some watches, small pieces of precious stones, such as rubies or sapphires, are used at the points on which the wheels mm. Since these stones are very hard, they do not wear down very easily under the friction of the moving wheels. Thus a watch utilizing such stones will keep accurate time over a much longer period than other watches.
Some modern watches can measure very small fractions of time. These watches ore useful in timing athletic events. When a button is pressed on these watches, a special second hand begins to move. This type of watch can also be used to count a patient’s pulse. It would be difficult to imagine today’s world without clocks and watches.
选项
A、Because they have a smooth surface.
B、Because they are very expensive.
C、Because they are very hard.
D、Because they turn very well.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/Fxt7777K
0
大学英语四级
相关试题推荐
CholesterolandHeartDiseaseDoyouknowyourcholesterollevel?Manypeopledon’t.Ahighlevelofcholesterolinthebloo
Accordingtothepassage,developmentalistswouldagreewithwhichofthefollowingviews?Theauthor’smainpurposeinwriting
FormanyAmericans,Easteristhemostreligiousholidayoftheyear.MorepeoplegotochurchonEaster【B1】______thanatany
A、Becausehewantedtodigoutgoldandsilver.B、Becausehewantedtoenjoytheclimatethere.C、Becausehewantedtogetaway
Forthispart,youareallowed30minutestowriteacompositiononthetopicHighSchoolStudents’GoingAbroadforStudies.Yo
A、Athome.B、Onafarm.C、Atabirthdayparty.D、Inarestaurant.DM:Haveyoumadeachoicebetweenthechickenandthefish?W
A、7:55.B、7:45.C、7:50.D、8:00.AW:Whattimedoestheballetstart?M:At8:30.Wehave35minutestogetthere.Q:Whattimei
TheBritishpredecessorshavebeendisplacedorannihilatedbywavesofinvaders.BeforeRomantimes,withoutpoliticalmeaning
A、TheycontributetothemodernizationofAmericanfarms.B、Theyhelptoincreasethestategovernments’revenue.C、Theyprovide
A、Catchingrunawaycriminals.B、Scratchingthehiddenbombs.C、Patrollingthedangeroustown.D、Drag-sniffingorbomb-sniffing.
随机试题
医际关系与医患关系是
正常孕卵植入部位:
浙江浙海服装进出口公司(3313910194)在对口合同项下进口蓝湿牛皮,委托浙江嘉宁皮革有限公司(3313920237)加工牛皮沙发革。承运船舶在帕腊纳瓜港装货启运,航经大阪,又泊停釜山港转“HANSASTAVANGER”号轮HV300W航次(提单号:H
课上,某幼儿想喝水,老师正确的做法是()。
张某11周岁.小学五年级学生,经常在其学校门口的一家小卖部买零食和一些学习用品.部分赊账,年终时共欠小卖部340元。小卖部老板拿着账单要求张某父亲付款,遭到张某父亲拒绝。下列说法正确的是:
【蒙藏院】云南大学2013年历史学综合真题
A、 B、 C、 D、 D
Threemakesatrend.TheWashingtonPostCo.FridayannouncedthatitwouldlooktosellitsheadquartersbuildingindowntownW
输入设计应该遵循一定的原则,下列()不属于输入设计应该遵循的原则。
Allsubstances,________,liquidorsolid,aremadeupofatoms.
最新回复
(
0
)