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
2025-02-24
9
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/3970810.html
相关试题推荐
Acertainbrownierecipestatesthatthebrowniesshouldbebakedinarectangul
AcertainhighwayhasExits1,2,3,and4inthatorder.Whichofthefollowing
RecommendedMaintenanceScheduleforaCertainAuto(GiveninMiles)[img]2014m5x
If55percentofthepeoplewhopurchaseacertainproductarefemale,whatist
Acertainshippingservicechargesaninsurancefeeof$0.75whenshippinganyp
Ofthe700membersofacertainorganization,120arelawyers.Twomembersofth
Therangeoftheheightsofthefemalestudentsinacertainclassis13.2inche
Amanagerisforminga6-personteamtoworkonacertainproject.Fromthe11c
Ofthepeopleinacertainsurvey,58percentwereatmost40yearsoldand70p
Inacertainsequenceofnumbers,eachtermafterthefirsttermisfoundbymul
随机试题
AslongastheAmericanlandwasnotcompletelysettledandtheelementsof【
It’sveryinterestingtonotewherethedebateaboutdiversity(多样化)istaking
Whichofthefollowingsentencesexpressesapassivemeaning?A、Bellinventedthe
[originaltext]W:Jack,wouldyouminddrivingmetothestation?M:Sure,why
在相关图法中,下列图形称之为( )。 A.强正相关 B.强负相关 C.不
痹证关节疼痛日久肿胀局限或见皮下结节者为A.瘀 B.热 C.风 D.湿
清道夫受体有广泛的配体谱,其配体的共同特点是A:都为多阴离子化合物B:都含有A
( )是指当对一个人的某些特性形成好或坏的印象之后。人们就倾向于据此推论其他方
波浪理论考虑三方面的因素,其中,()是最重要的,也是波浪理论赖以生存的基础。A:
(2019年真题)根据《标准设计施工总承包招标文件》,关于责任保险的说法,正确的
最新回复
(
0
)