首页
登录
职称英语
In a series of races, 10 toy cars are raced, 2 cars at a time. If each car must
In a series of races, 10 toy cars are raced, 2 cars at a time. If each car must
游客
2024-01-12
4
管理
问题
In a series of races, 10 toy cars are raced, 2 cars at a time. If each car must race each of the other cars exactly twice, how many races must be held?
选项
A、40
B、90
C、100
D、180
E、200
答案
B
解析
在一系列比赛中,有10辆玩具汽车进行比赛,每场比赛有2辆汽车参加。若每辆汽车必须和其他的各辆汽车比赛两次,问一共要举行有多少场比赛?
解:本题的正确答案为(B)。10辆车中,每辆车与另一辆车比赛一次,相当于从10辆汽车中任选2辆车比赛,共45次;而比赛2次,则共有2×45=90次。
转载请注明原文地址:https://tihaiku.com/zcyy/3356840.html
相关试题推荐
Tomakeupanobjectivetest,theteacherwritesaseriesofquestions,______ha
Thepolice______thathecommittedaseriesofcrimesinthenorthofthecity.
Tomakeupanobjectivetest,theteacherwritesaseriesofquestions,______ha
Tomakeupanobjectivetest,theteacherwritesaseriesofquestions,_________
Inaseriesofraces,10toycarsareraced,2carsatatime.Ifeachcarmust
Inanunfinishedbuthighlysuggestiveseriesofessays,thelateSarahEise
Inaseriesofraces,10toycarsareraced,2carsatatime.Ifeachcarmust
Inaseriesofraces,10toycarsareraced,2carsatatime.Ifeachcarmust
ThenovelHowtheGarciaGirlsLostTheirAccentsisactuallyaseriesof______;
WhatkindsofTVshowsarepopularinyourcountry? TVseriesisthemostpopul
随机试题
WhatistrueaboutthethreecentralcharactersinReturntoNothing?[br][ori
[originaltext]W:Hello,Dr.Christianson.M:Hello,Cathy,whatcanIdoforyo
Beingabletomultitaskishailedbymostpeopleasawelcomeskill,butnot
Aswarspreadstomanycornersoftheglobe,childrensadlyhavebeendrawn
混凝土工程中,发包人需要支付的是()。A.混凝土预制构件模板所需费用 B.施工
货币期货又称( )。A.股票期货 B.外汇期货 C.债券期货 D.利率期
Thechangeinthatvillagewasmiraculou
特殊口腔护理的适应证不包括A.禁食 B.高热 C.鼻饲 D.昏迷 E.腹
在变电评价管理规定中,地市公司状态评价班履行的职责有(____)按照评价工作实施
下列包装物属于折价回收的有()。A.麻袋 B.集装箱 C.油漆桶 D.电
最新回复
(
0
)