首页
登录
职称英语
A certain spiral staircase is designed so that each step after the first one is
A certain spiral staircase is designed so that each step after the first one is
游客
2024-01-12
17
管理
问题
A certain spiral staircase is designed so that each step after the first one is turned 20° counterclockwise from the one immediately below it, how many of the steps make up 2.5 complete revolutions?
选项
A、18
B、36
C、38
D、45
E、50
答案
D
解析
某一螺旋梯按照高一级台阶相对于低一级台阶逆时针旋转20°来设计,问2.5圈的旋梯共有多少级台阶组成?
解:本题的正确答案为(D)。“revolution”意为旋转一周,由题意可得台阶数为:360°× 2.5 ÷ 20°=45
转载请注明原文地址:https://tihaiku.com/zcyy/3356248.html
相关试题推荐
Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwar
Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwar
Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwar
Ourpreferencesforcertaincolorsare______accordingtothepassage.[br]Whi
Ourpreferencesforcertaincolorsare______accordingtothepassage.[br]Whi
Ourpreferencesforcertaincolorsare______accordingtothepassage.[br]If
Thedegree______youmaintainyourmentalhealthmaydependoncertainsimpleenv
SpeakerA:I’dlikeabeer.SpeakerB:Certainlysir,______A、I’lltakeit.B、w
Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwar
Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwar
随机试题
[originaltext]M:Ineedanencyclopediatofindoutsomething.CanIlookatma
Anumberofrecentbookshavereworkedsubjects,formsandwritingtechnique
Scientistsfearrisingenergybillsmayleadtoanincreaseinobesityafter
B
男,3岁,发热1天,呕吐2次,腹泻15次,初为水样便,继而黏液脓血便,量少,每次
对诊断急性胰腺炎最有价值的血清酶检查是A.天门冬氨酸氨基转移酶(谷草转氨酶)
(2020年真题)某单位对进场的湿式报瞽阀组进行渗漏检验,下列试验方法及结果中符
目前我国社会组织包括()。 A.国有企业B.基金会C.民办非企业单位D.社
“社会适应量表”是由()于1974年编制的。 A.霍姆斯和雷赫B.莱威和辛
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)