首页
登录
职称英语
A train travels from Beijing to Tianjin at an average rate of 40 miles per hour
A train travels from Beijing to Tianjin at an average rate of 40 miles per hour
游客
2024-01-12
46
管理
问题
A train travels from Beijing to Tianjin at an average rate of 40 miles per hour in the morning, and then comes back from Tianjin to Beijing at an average rate of 50 miles per hour at night.
Quantity A: the average speed of the train in a whole day
Quantity B: 45 miles per hour
选项
A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案
D
解析
由于我们无法知道一共有多少距离,所以此题无法求得平均速度,选择D。
转载请注明原文地址:https://tihaiku.com/zcyy/3354900.html
相关试题推荐
IntheUnitedStates,averagefuelefficiencyofnewlymanufactureddomesticcar
PurebredcowsnativetoMongoliaproduce,onaverage,400litersofmilkperyea
Aresearcherstudyingdrugaddictsfoundthat,onaverage,theytendtomanipula
1.TheaveragelifeexpectancyfortheUnitedStatespopulationasawholeis9
Excludingpurchasesbybusinesses,theaverageamountspentonafactory-newcar
TheaverageageandracingexperienceofthedriversattheIndianapolis500aut
Studiesshowthatyoungpeoplewithhigher-than-averagebloodpressureandtheir
TheForbiddenCityinBeijing,fromwhichtheemperorsruledbyheavenlymandate
InAustralia,inyearswithbelow-averagerainfall,lesswatergoesintorivers
Theaverage(arithmeticmean)of3differentpositiveintegersisequaltothe
随机试题
Itiswellknownthatknowledgeisthe______conditionforexpansionofmind.A、i
GesturesI.Theuniversalusageofgesturesin
女性,25岁,饱餐后玩呼啦圈后突发脐周疼痛,不断加重,伴频繁呕吐,呕吐物中有少量
在Word中,下列选项中哪种字号最大?()A.五号 B.小五 C.四号
在砂浆中加入石灰膏可改善砂浆的以下哪种性质?( )A.保水性 B.流动性
以下关于COM+的描述中,不正确的是( )。A.COM+是COM的新版本,它使
(2018年)根据《测绘地理信息业务档案管理规定》,国家或地方重大测绘地理信息项
具有清热解毒,泻火利咽的功能是A.小儿热速清口服液 B.解肌宁嗽丸 C.止泻
下列职责中,不属于施工单位消防安全职责的是()。A.制定施工现场的消防安全制度
男,15岁,最近出现夜间视物不清,且逐渐加重,全身皮肤干燥,脱屑,该男孩可能是哪
最新回复
(
0
)