A set of dominoes (多米诺) consists of rectangular (矩形的) tiles each carrying two numbers from 0 to 6 which represented by patterns

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问题 A set of dominoes (多米诺) consists of rectangular (矩形的) tiles each carrying two numbers from 0 to 6 which represented by patterns of spot. Every possible pairing of numbers occurs just once, including each number with itself.
How many dominoes are there in a set?

选项

答案28

解析

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本试题收录于： C类竞赛（非英语专业本科）题库大学生英语竞赛（NECCS）分类

C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

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A set of dominoes (多米诺) consists of rectangular (矩形的) tiles each carrying two numbers from 0 to 6 which represented by patterns

C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

Whatdidthemandolastnight?

WouldyouliketoorbittheEarthinsidetheInternationalSpaceStation?Nowyoucantakeaspaceholiday—foraprice.Thisis

Bicyclesharinghasbeenahotlydebatedtopicoverthepasttwoyears.BicyclesarenothingexotictoChinesepeople.Inthe19

"Home,sweethome"isaphrasethatexpressesanessentialattitudeintheUnitedStates.Whethertherealityoflifeinthefam

Theopeningofyourpresentationisyourfirstopportunitytomeettheprospectfacetoface.Itisthemostimportantpartofy

ApartmentforRentModernstudioapartmentlocated10minutesfromshopsandsubway2bedrooms,kitchen,living/diningr

SeguenceWhichofthefollowingcontinuestheabovesequence?

Openingnightat.theGandhiRestaurantbroughtcriesofpraiseanddelightfromcustomerswhentheysampledtheuniquecuisine

Anyonewithhalfaneyeontheunemploymentfiguresknewthattheassertionabouteconomicrecovery______justaroundthecorne

Apartfromtakingcareofherchildren,shehastotakeonsuchheavy______houseworkascarryingwaterandfirewood.

在骨骼肌细胞兴奋一收缩耦联过程中起关键作用的离子是()

公文首页必须显示正文。正文一般用3号仿宋体字，编排于主送机关名称下一行，每个自然段左空二字，回行顶格。()

依法治国是党领导人民治理国家的()。

干粉灭火系统按灭火方式可分为()。

下列项目中，能引起负债和所有者权益同时发生变动的是()。

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以下描述中，错误的是()。

Theword"fast"inthephrase"breakthefast"inparagraph2meansWhichfoodisNOTfitforbreakfast?

A、Theirmotherstaughtthem.B、TheytraveledtoAfrica.C、Theylearnedinschool.D、Theytaughtthemselves.A细节题。根据They’vebeen