The abacus _____ invented in the sixth century by Chinese pe

单数,单数
都是用there is

calculating
calculation
calculato

ask 询问calculating 计算alphabetical 字母顺序的responsible 有责任的decimal 小数

是全球分销系统,GDS,你可以理解为卖机票的渠道公司.

很乐意看到你对算盘很感兴趣

In what does the abacus shows a number?

“打算盘” ＝calculate on the abacus.
或 calculate on an abacus.
------------------------------------(特别补充一下)
楼主说的：work an abacus 是可以的
例如：
She knows how to work on the abacus.
她会打算盘.

so that ,can
考察so that 的用法

C


此题考查的是被动语态，由be+过去分词。算盘是人发明的，它是动作的承受者。发明在过去，故用was invented,选C。

The abacus shows a number in the picture

形容词dusty 一词带有废旧的隐含意义,用这个词来描述算盘似乎是合适的,因为在计算器和计算机发明以前,算盘是用来解决算术问题的计算工具.事实上算盘原本就很容易脏.abacus 一词的希腊词源 abax 可能源自希伯来语 abaq,意为“灰尘”,但具体的演变过程已不是很清楚了.abaq 在《圣经》之后的用法中有“用以书写的沙面”的意思.希腊词abax 有“在一木板上洒上沙子或尘土用以画几何图形”之意.这种木板就类似于我们所熟悉的装有可移动算子的算盘.abacus 第一次被使用是在一本1387年以前用中古英语写成的作品中,指阿拉伯人使用的沙板算盘.中古英语的abacus 与其希腊词源 abax 词形上的区别是因为中古英语借用了拉丁文 abacus,而该拉丁文又是从希腊词abax 的所有格形式 abakos 演变而来的

含到现在为止的意思.
them指代abacus,made from wood 只是定语起到修饰作用,只为了说明当时的算盘是用木头做的 ,就算去掉了句子也是完整的.

at least
stands for
in many different ways
Use your brain
square root
write down
in words
consist of
started from
in a flash
on the abacus
in ancrent times

I have( an)abacus
我有一个算盘

A simple calculation with abacus is fast than electronic calculato

abaci ['æbəsai]

When and where was the abacus invented

你也说了是英式

发音没说是英式的啊

abacus
[ab·a·cus | | 'æbəkəs]

前美后英


````````````````````````````````````````
答案有帮助还望及时采纳、谢谢、
祝学习进步、

第一架计算机器是算盘.算盘很快也很方便.在算盘上,从最下面的开始,在杆子上的珠子代表着一,十,百,千.图片中的算盘表示着一个数,计算之后把这个词写下来.用这个数乘零再加一,然后的结果是什么?
高级电子计算器可以算加减乘除,它也可以算百分数和平方根.
电脑是很通用的计算器.一台电脑可以用来计算.电脑可以很短时间内进行计算.

选A,“最早的电脑是算盘”这是一个事实,因此用一般现在时代表过去时
类似的用法还有when引导的状语从句,主句是将来时,从句要用一般现在时来代替

雨伞
发明者：鲁班夫妇 发明时间：春秋
双筒望远镜
发明者：Hans Lippershey 发明时间：1608年
算盘
发明者：不详. 发明时间：西周以前
照相机
发明者：达盖尔 发明时间：1839年8月19 日
自行车
发明者：黄履庄 发明时间：清康熙年间

what is in the abcus show a number?

favourites
abacuses、abaci

B

An abacus,also called a counting frame,is a calculating tool used primarily in parts of Asia for performing arithmetic processes.Today,abaci are often constructed as a bamboo frame with beads sliding on wires,but originally they were beans or stones moved in grooves in sand or on tablets of wood,stone,or metal.The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants,traders and clerks in Asia,Japan,Africa,India and elsewhere.
The user of an abacus is called an abacist; he or she slides the beads of the abacus by hand.[1]
The earliest known written documentation of the Chinese abacus dates to the 14th century AD.[13]
The top of the abacus is called the heaven and the bottom is called the earth.[14]
The Chinese abacus known as the suànpán is typically 20 cm tall and it comes in various widths depending on the operator.It usually has more than seven rods.There are two beads on each rod in the upper deck and five beads each in the bottom for both decimal and hexadecimal computation.Modern abacuses have one bead on the top deck and four beads on the bottom deck.The beads are usually rounded and made of a hardwood.The beads are counted by moving them up or down towards the beam.If you move them toward the beam,you count their value.If you move away,you don't count their value.[citation needed] The suanpan can be reset to the starting position instantly by a quick jerk along the horizontal axis to spin all the beads away from the horizontal beam at the center.
Suanpans can be used for functions other than counting.Unlike the simple counting board used in elementary schools,very efficient suanpan techniques have been developed to do multiplication,division,addition,subtraction,square root and cube root operations at high speed.
In the famous long scroll Along the River During the Qingming Festival painted by Zhang Zeduan (1085–1145 AD) during the Song Dynasty (960–1297 AD),a suanpan is clearly seen lying beside an account book and doctor's prescriptions on the counter of an apothecary's (Feibao).
The similarity of the Roman abacus to the Chinese one suggests that one could have inspired the other,as there is some evidence of a trade relationship between the Roman Empire and China.However,no direct connection can be demonstrated,and the similarity of the abaci may be coincidental,both ultimately arising from counting with five fingers per hand.Where the Roman model (like most modern Japanese) has 4 plus 1 bead per decimal place,the standard suanpan has 5 plus 2,allowing use with a hexadecimal numeral system.Instead of running on wires as in the Chinese and Japanese models,the beads of Roman model run in grooves,presumably making arithmetic calculations much slower.
Another possible source of the suanpan is Chinese counting rods,which operated with a decimal system but lacked the concept of zero as a place holder.The zero was probably introduced to the Chinese in the Tang Dynasty (618-907 AD) when travel in the Indian Ocean and the Middle East would have provided direct contact with India,allowing them to acquire the concept of zero and the decimal point from Indian merchants and mathematicians.

用one of 后面跟名词,多要用复数啊 ,表示.之一

选D～～～～～～～～～～～～～算盘是什么时候发明的．

ab’-a-cus 3音节
ex‘-ist 双音节
gen’-tle 双音节
a-mus‘-ment 3音节
lan‘-guage 双音节
usesmixes\washesrunsflies单音节

选B
算盘在6世纪被发明出来.这里考察的是序数词,six的序数词是sixth,但是不能忘记要加定冠词the,因为6世纪就那么一个,一说就是定指特指.

还要用英语解释：3.The abacus is an ancient invention.
Poeple made the couting tool--abacus hundreds years ago.
4.The Indians invented the systen of numbers.
The Indians first found how to count things in number.
5.Most of my answers are accurate.
Most of my answers are right.
1.The invention of the zero helped people calculate more easily.对calculate more easily提问.
How did the invention of the zero help people?
2.People wrote numbers in many different ways.对in many different ways提问.
How did people write numbers?
3.You mustn't eat in the reading room.改为祈使句
Don't eat in the reading room.
4.people,easier,for,work,machines,it,to,make.连词成句
Machines make it easier for people to work.

school interesting pulled had when that lesson practising asked felt Li Lei got a new abacus from his grandpa as he was going to have his first abacus lesson that day. On the way to school, Li Lei thought it would be interesting to roll the abacus like wheels. So with a string he pulled the abacus with his school bag on it. He had great fun. When he got to school, most of the beads were gone. And Li Lei was too careless to notice that. Soon it was time to have the abacus lesson. All the other pupils were practising, but Li Lei could do nothing but sit there. When the teacher asked him what had happened to his abacus, he felt very ashamed and could say nothing.

An abacus, also called a counting frame, is a calculating tool used primarily in parts of Asia for performing arithmetic processes. Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal. The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Japan, Africa, India and elsewhere.
The user of an abacus is called an abacist; he or she slides the beads of the abacus by hand.[1]
The earliest known written documentation of the Chinese abacus dates to the 14th century AD.[13]
The top of the abacus is called the heaven and the bottom is called the earth.[14]
The Chinese abacus known as the suànpán is typically 20 cm tall and it comes in various widths depending on the operator. It usually has more than seven rods. There are two beads on each rod in the upper deck and five beads each in the bottom for both decimal and hexadecimal computation. Modern abacuses have one bead on the top deck and four beads on the bottom deck. The beads are usually rounded and made of a hardwood. The beads are counted by moving them up or down towards the beam. If you move them toward the beam, you count their value. If you move away, you don't count their value.[citation needed] The suanpan can be reset to the starting position instantly by a quick jerk along the horizontal axis to spin all the beads away from the horizontal beam at the center.
Suanpans can be used for functions other than counting. Unlike the simple counting board used in elementary schools, very efficient suanpan techniques have been developed to do multiplication, division, addition, subtraction, square root and cube root operations at high speed.
In the famous long scroll Along the River During the Qingming Festival painted by Zhang Zeduan (1085–1145 AD) during the Song Dynasty (960–1297 AD), a suanpan is clearly seen lying beside an account book and doctor's prescriptions on the counter of an apothecary's (Feibao).
The similarity of the Roman abacus to the Chinese one suggests that one could have inspired the other, as there is some evidence of a trade relationship between the Roman Empire and China. However, no direct connection can be demonstrated, and the similarity of the abaci may be coincidental, both ultimately arising from counting with five fingers per hand. Where the Roman model (like most modern Japanese) has 4 plus 1 bead per decimal place, the standard suanpan has 5 plus 2, allowing use with a hexadecimal numeral system. Instead of running on wires as in the Chinese and Japanese models, the beads of Roman model run in grooves, presumably making arithmetic calculations much slower.
Another possible source of the suanpan is Chinese counting rods, which operated with a decimal system but lacked the concept of zero as a place holder. The zero was probably introduced to the Chinese in the Tang Dynasty (618-907 AD) when travel in the Indian Ocean and the Middle East would have provided direct contact with India, allowing them to acquire the concept of zero and the decimal point from Indian merchants and mathematicians.