首页
登录
职称英语
On a certain number line, if -7 is a distance 4 from n and 7 is a distance of 18
On a certain number line, if -7 is a distance 4 from n and 7 is a distance of 18
游客
2024-01-12
44
管理
问题
On a certain number line, if -7 is a distance 4 from n and 7 is a distance of 18 from n then n =?
选项
A、25
B、11
C、3
D、-3
E、-11
答案
E
解析
在某一数轴(number line)上,假如-7与n的距离是4,且7与n的距离是18,问n等于多少?
解:本题的正确答案是(E)。涉及数轴上的两个数距离问题,要用到绝对值的概念。由题义可得:根据第一个条件,n=-11或-3;根据第二个条件,n=-11或25;所以n=-11。考生在解答此类题目时,一定要注意下面这句话的确切含义:
(1)7 is a distance of 4 from n.
(2)7 is the distance of 4 from n.
上面第一句话用了不定冠词,应理解为7与n之间的距离是4;第二句话用了定冠词,应理解为7是4和n之间的距离。
转载请注明原文地址:http://tihaiku.com/zcyy/3356288.html
相关试题推荐
Thegrowthofachildisinfluencedbyanumberoffactors,______arebeyondour
Thefactoryhadto______anumberofemployeesbecauseoftheeconomicdeclinein
Duringthelastthreedecadesthenumberofpeopleparticipatinginphysicalfit
Thenumberofprimaryschoolsintheruralareas______doublinginthepast50ye
Normallyastudentmustattendanumberofcoursesinordertograduate,and
Normallyastudentmustattendanumberofcoursesinordertograduate,and
Thenumberoftheemployeesinourcompanyis________thatintheirs.A、twiceasl
Givemeyourtelephonenumber,________Ineedyourhelp.A、whetherB、unlessC、ore
众所周知现在老人的数量正变得越来越多。Itisknownthatthenumberoftheoldpeopleisgettinglarg
Thesumofthenon-primenumbersbetween40and50,non-inclusive,isA、131B、176
随机试题
[img]ct_epem_epelisv_00981(20097)[/img][br][originaltext]Whattimeisitbyy
Manyarticlesandbookshavebeenwritteninrecentyearsaboutcultureinor
Growingoldisnotexactlypleasantforpeoplein【C1】______Americancultu
December1D
Thechildmaygetconfusedathearingthecolorofwhiteusedforpaperwhenhe/
“可持续发展(SustainableDevelopment)”的观念第一次在国
房地产投资风险管理中最适用的方法是( )。A.风险规避 B.风险组合 C.
某12m跨重级工作制简支焊接实腹工字形吊车梁的截面几何尺寸及截面特性如图1-11
关于失能收入损失保险的说法,正确的有()。A.失能收入损失保险承保被保险人因疾病
符合中枢性瘫痪的临床特征是A.肌群瘫痪为主 B.有肌萎缩 C.肌张力增高
最新回复
(
0
)