【第105题】自然数的基数意义和序数意义有什么不同?

强调所造成的结果对现在有影响.这就是过去时与现在完成时的区别之一.

解题思路：任何相邻的4个数码之和都是20，所以，四个数一循环所以剩下的一个数是20-4-3-9=4．
105÷4=26…1 所以第1个数是3
1043÷4=260…3余 所以第三个数是9
128÷4=34，所以第4个数是4，
则第二个数码是4．
所以数字应该是349434943494…．

20-4-3-9=4．
105÷4=26…1 所以第1个数是3
1043÷4=260…3余 所以第三个数是9
128÷4=34，所以第4个数是4，
则第二个数码是4．

点评：
本题考点： 页码问题．

考点点评： 求出剩下的数是4的前提下，根据所给数的顺序数及循环数，求出余数确定是完成本题的关键．

andra这句话是后来来了之后问的老板,和中文情景其实一样的啊,“老板,你刚才是要找我么?”（意指我现在来了）,之前她不在,Bob叫了她她才来的,中间有段时间间隔的

在实际生活中,语调扮演着暗示说话者情绪及态度的角色.说话者会根据说话时的情形选择语调来表达情绪及意愿.Where's Miss Simpson,Bob?Bob用升调,问话者很想知道Miss Simpson在哪里,用声调表明一种恳切或正式的发问；Did you want to see me,sir?的sir用降调可以表示问话者的不耐烦、质疑情绪或一种随意的态度.所以同一句话不同语调就可以表达不同的意思,这和我们把重音放在不同的单词上可以表达不同意思是一样的道理.

答案：
Lesson 106
A
1 I want you to spell it.
2 I want you to telephone him.
3 I want you to wear it.
4 I want you to ask her.
5 I want you to tell them.
6 I want you to help us.
B
1 What do you want me to do?I want you to carry it.
2 What do you want me to do?I want you to correct it.
3 What do you want me to do?I want you to listen to it.
4 What do you want me to do?I want you to describe it.
5 What do you want me to do?I want you to move it.
6 What do you want me to do?I want you to try it.
7 What do you want me to do?I want you to finish it.
8 What do you want me to do?I want you to keep it.
C
1 She is telling him not to hurt himself.She doesn't want him to hurt himself.
2 She is telling him not to slip.She doesn't want him to slip.
3 She is telling him not to fall.She doesn't want him to fall.
4 She is telling them not to miss it.She doesn't want them to miss it.
5 She is telling him not to break it.She doesn't want him to break it.
6 He is telling her not to drive it.He doesn't want her to drive it.
D
1 Because she doesn't want him to hurt himself.
2 Because she doesn't want him to slip.
3 Because she doesn't want him to fall.
4 Because she doesn't want them to miss it.
5 Because she doesn't want him to break it.
6 Because he doesn't want her to drive it.

An=4*(10^n-1)/9 (n=1,2,3,...)
这样分析：
A1 = 4 = 4*10^0 =4*(10^0)
A2 = 44 = 4*10^0+4*10^1 =4*(10^0+10^1)
A3 = 444 = 4*10^0+4*10^1+4*10^2 =4*(10^0+10^1+10^2)
...
An = 44...4(n个4) =4*(10^0+10^1+10^2+...+10^(n-1))
此时关键就是求出首项为1,公比为10的等比数列10^0+10^1+10^2+...+10^(n-1)前n项和：1*(1-10^n)/(1-10)
即：(10^n-1)/9
所以：An=4*(10^n-1)/9 (n=1,2,3,...)

自然数的基数含义和序数含义
秦皇岛市山海关文化教育局 王英
邮编：066200
每个自然数都可以表示两种含义,一种是基数含义,一种是序数含义.表示物体数量（几个）用的是自然数的基数含义,如15个学生中的“15”、一年中有12个月中的“12”、8本书中的“8”表示的都是自然数的基数含义.
自然数的序数含义表示的是被数物体在第几个位置的次序,如第12个月中的“12”、第25位中的“25”表示的都是自然数的序数含义.
人教版认识10以内各数的教学中,安排了数小棒、数情境图中的事物来理解数的基数含义,通过填一填、圈一圈、涂一涂第几个来理解数的序数含义.在教学中不必出现“基数”和“序数”这样的名词,只要学生能够按要求数出几个,找出第几个即可.

=I hope the dictionary will be helpful to you.