we use "X" as the ---for an unknown quantity.A sign B symbol C mark 其他错在哪 区别是什么

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weuse"X"asthe---foranunknownquantity.AsignBsymbolCmark其他错在哪区别是什么weuse"X"asthe---foranunknownquantity

we use "X" as the ---for an unknown quantity.A sign B symbol C mark 其他错在哪 区别是什么
we use "X" as the ---for an unknown quantity.
A sign B symbol C mark 其他错在哪 区别是什么

we use "X" as the ---for an unknown quantity.A sign B symbol C mark 其他错在哪 区别是什么
In general,all three A,B,C can be used,but B 'symbol' is much more common.
The symbol "X" can also be called 'a mark' or 'a sign';
The following are all possible usages:
1.We use the symbol "X" to represent an unknown quantity.(more common)
2.We use the mark "X" to represent an unknown quantity.
3.We use the sign "X" to represent an unknown quantity.
4.We mark an "X" to represent an unknown quantity.
5.We sign an "X" to represent an unknown quantity.
6.We mark an "X" for an unknown quantity.
7.We sign an "X" for an unknown quantity.
以上7种方式都是可以接受的美语,1 是最长使用的.
Hope this helps.
Cheers
Note:本人已在海外生活了数十载.为了慎重起见,我的答案都与老美或老英交换过意见,你放心使用吧.如有任何问题,可补而述之.

因为symbol有符号的意思,sign 和mark一般都为标记,记号的意思。

这三个词都有标记和符号的意思;sign指能看到或感觉到的事物,也可指思想和身体状况;signal知警告,命令或给予信息的声音和动作,也可指引起某事发生的信号,这种信号是人们通常或事先约定的.symbol指代表某种思想,人,物,价值的符号或物体,通常比较抽象.选b比较符合....

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这三个词都有标记和符号的意思;sign指能看到或感觉到的事物,也可指思想和身体状况;signal知警告,命令或给予信息的声音和动作,也可指引起某事发生的信号,这种信号是人们通常或事先约定的.symbol指代表某种思想,人,物,价值的符号或物体,通常比较抽象.选b比较符合.

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A sign B symbol C mark

定语从句as we use the word中,as是the word的同位语是什么意思? I think ,the most--------,we must use it as often as possible(importance important importantly ) I think ,the most--------,we must use it as often as possible(importance important importantly ) We shall use the spare room in our new house as a( ).We shall use the spare room in our new house as a( ).括号里填什么? we use X as the ---for an unknown quantity.A sign B symbol C mark 其他错在哪 区别是什么 Usually we use X as the symbol____an unknown word or a wrong answer.A.ofB.forC.toD.in...可是答案是B we shall use the spare room in our new house as a study 求翻译 请译...such as pollution and the way we use energy. 翻译:We can use a gerund as the subject of a sentence . As the saying goes Every coin has two sides.If we can control ourselves,we can make the best use For it is not so much the hours that tell,as the way we use them.麻烦分析一下句子成分 英语名子结构分析Church as we use the word refers to all religious institutions,be they Christian Islamic,Buddist,Jewish,and so on.句中as we use the word是插入语吗,还是别的什么语法结构? let't learn to use the problem we facing as a stepping stone to future success 翻译 括号部分的句子结构理解~Just use this room (for the time being),and we’ll offer you a larger one as soon as it becomes available. we should use ( )possible for the sake of economyA.less money than B.as little money as 为什么A不能选 what do we use the computer( )介词 We use thermometer to measure the temperature use the word as often as you can的意思