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
22
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
A、EveryoneishappyaboutrealityTV.B、RealityTVwilldowellmmanycountries.C、AllthepeopleinEuropeareinfavorofrea
A、Makeuphomeworkproblems.B、Doresearchinthelibrary.C、Teachanintroductoryeconomicscourse.D、Gradehomeworksets.DWha
Letusconsiderwhatscienceandtechnologyhavetocontributetothefoodproblem.Thesimplestwaytoincreasefoodproduc
A、Becausehumanfaceshavecomplexfeatures.B、Becausehumanfingerprintsprovideuniqueinformation.C、Becausepeople’sbehavio
Accordingtothepassage,theFrenchworkerswere______.Accordingtothepassage,Frenchproduction______.
A、HequitteachinginJune.B、Hehasleftthearmyrecently.C、Heopenedarestaurantneartheschool.D、Hehastakenoverhisb
A、Intherestaurant.B、Attherailwaystation.C、Inthepostoffice.D、Attheairport.DM:Excuseme,butwhichgateisforflig
A、11-weekcourseforcontrolduty.B、11-weekcourseforpatrolduty.C、9-weekcourseforcontrolduty.D、9-weekcourseforpatro
A、Walkaroundtheapartmentfordangeroussigns.B、Checkthewaterandelectricitytoseeiftheyareworking.C、Makesurethere
PassportsIfyou’veevertraveledoutsidetheUnitedStates,oneofthemostimportanttasksyouhadtocompletebeforeyour
随机试题
根据有关规定,中外合作经营企业的合作各方在合作期限届满前,经协商同意延长期限,并向审批机关提出延长合作期限申请而获得批准的,延长期限的起算日期是()。
制造六味地黄丸组分的粉碎应采取的粉碎方法是
A.山药、熟地、茯苓、黄柏、知母、丹皮B.白芍、熟地、茯苓、黄柏、地骨皮、丹皮C.白芍、当归、川芎、莪术、牛膝、丹皮D.赤芍、猪苓、茯苓、车前子、牛膝、丹皮E.白芍、白术、苍术、车前子、柴胡、陈皮止带方的组成成分有
有关处方书写正确的是
患儿,男,3个月。因哭闹时脐部突起就医,诊断为脐疝,患儿家长很是担心,护士对家长进行健康教育,不妥的是
悬吊管与雨水斗出口高差应大于()m。
【背景资料】 某堤防工程项目业主与承包商签订了工程施工承包合同。合同中估算工程量为5300m3,单价为180元/m3。合同工期为6个月。有关付款条款如下: (1)开工前业主应向承包商支付估算合同总价20%的工程预付款。 (2)业主自第一个月起,从承包
证券初始登记包括()等。
自2011年起美国苹果公司与韩国三星电子在全球范围内掀起的专利大战近日再燃硝烟。虽然这场交锋的争夺_______在美国市场,然而对于快速成长的中国智能终端产业和销量猛增的国产智能手机而言,决不可_______,而应提前敲响专利警钟,以技术创新冲破专利枷锁。
若患者表现为言语增多且无法打断,则在BRMS“言语”一项应给的分数是()分。
最新回复
(
0
)