加减消元法

by Jason Marshall In past articles weve talked at length about three of the big four traditional processes used in basic arithmetic: addition (see also How to Add Quickly), subtraction, and division. However, for one reason or another, we havent yet

发表于:2018-12-07 / 阅读(66) / 评论(0) 分类 数学英语

You Do the Math Hello and welcome to Words and Their Stories from VOA Learning English. On this program we explain how to use common expressions in American English. We also explore the origins of these expressions. Where do they come from? Today we

发表于:2018-12-16 / 阅读(138) / 评论(0) 分类 2016年VOA慢速英语(十)月

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Those of you following the World Cup know that at this stage there can be no more draws. Ties are broken during overtime play, or in a penalty kick shootou

发表于:2018-12-24 / 阅读(66) / 评论(0) 分类 Scientific American(六)月

When I was a kid I was top of the class in maths. I was really good at mental arithmetic and doing sums. Things were easy back then, It was all addition and subtraction, multiplication and division. I knew my times tables like the back of my hand. Th

发表于:2018-12-28 / 阅读(73) / 评论(0) 分类 听一分钟英文-M

by Jason Marshall In the previous article we talked about using the number line to help you keep your signs straight when adding positive and negative integers. In this article were taking things one step furthernot just adding positive and negative

发表于:2019-01-02 / 阅读(131) / 评论(0) 分类 数学英语

This is Scientific Americans 60-second Science, Im Cynthia Graber. This will just take a minute. I still tend to move my fingers almost subconsciously when doing arithmetic. Well, that might be not so strange according to research published in the Ma

发表于:2019-01-08 / 阅读(88) / 评论(0) 分类 Scientific American(五)月

The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic s

发表于:2019-01-08 / 阅读(71) / 评论(0) 分类 英语小短文

EDUCATION REPORT - After 40 Years, Calculators in School Still Add Up to Debate By Nancy Steinbach / Broadcast: Wed, 7 Nov 2007 16:00:00 UTC This is the VOA Special English Education Report. Can you do the math: What is one hundred times four, divid

发表于:2019-01-11 / 阅读(51) / 评论(0) 分类 VOA慢速英语2007年(十一)月

World Bank President: Elimination of Poverty Possible World Bank President Jim Yong Kim says the problems of poverty, hunger and inequality are massive, urgent and a matter of survival for millions. We know that despite the dramatic successes of the

发表于:2019-01-14 / 阅读(66) / 评论(0) 分类 VOA标准英语2013年(四月)

Green Card Lottery Faces Elimination Under US Immigration Reform Two years ago Rafiq-ul-Islam won a U.S. permanent resident visa through the Green Card Lottery and came to the United States from Bangladesh -- with little more than the clothing he own

发表于:2019-01-14 / 阅读(83) / 评论(0) 分类 VOA标准英语2013年(五月)

When I was a kid I was top of the class in maths. I was really good at mental arithmetic and doing sums. Things were easy back then, It was all addition and subtraction, multiplication and division. I knew my times tables like the back of my hand. Th

发表于:2019-01-21 / 阅读(73) / 评论(0) 分类 纯正英语一分钟

Coverage 险别 A:I am calling to discuss the level of insurance coverage you've requested for your order. 我打电话是想讨论您所要求的订单保险额的级别。 B:I believe that we have requested on amount twenty-five percent above the i

发表于:2019-01-23 / 阅读(52) / 评论(0) 分类 外贸英语一点通

Say it with us: Kids today have it sooooo easy. A new smartphone app will do their math homework for them, provided it's not too complicated. PhotoMath by microblink uses a phone's camera to solve equations and then teaches you the step-by-step metho

发表于:2019-02-02 / 阅读(72) / 评论(0) 分类 阅读空间

add v.(to)加,增加;补充说,又说 解析:addition n.加,加法;附加物 additional a.附加的 subtraction n.减法 division n.除法 multiplication n.乘法 数学plus 加 / minus 减 add up t

发表于:2019-02-03 / 阅读(51) / 评论(0) 分类 英文语法词汇

Q: Lately I have struggled to get out of bed despite waking up a decent time to go to my lab (I'm a grad student), the end result being I fall asleep again and end up going in about 11.5 hours later than I really want to. How do I make myself actuall

发表于:2019-02-06 / 阅读(105) / 评论(0) 分类 阅读空间

By Lisa Schlein Geneva 02 May 2006 Environmentalists are calling for the elimination of the toxic chemical, DDT, which is still used in large parts of Africa to combat malaria. The continued use of DD

发表于:2019-02-12 / 阅读(175) / 评论(0) 分类 2006年VOA标准英语(五月)

The UK government has said that from 2014, it will ban calculators in maths tests for primary school children in England. All 11-year-olds sit three maths tests. Pupils are allowed to use a calculator in the hardest of these. A sample question is: Ti

发表于:2019-02-21 / 阅读(72) / 评论(0) 分类 英语听力精选进阶版

New Words 新单词 concrete adj. 具体的 addition n. 加 subtraction n. 减 multiplication n. 乘 division n. 除 frequently adv. 频仍地 withdraw v. 掏出 formula n. 公式,程式 plus prep. 加 minus prep. 减 compound v. 合成 times n. 倍

发表于:2019-02-25 / 阅读(109) / 评论(0) 分类 实用英语

China's State Council Information Office has held a policy briefing conference, and Huang Shouhong, who is in charge of the drafting of the Government Work Report, underlined the key methods of supply-side reforms. From the industry level, supply-sid

发表于:2019-02-25 / 阅读(111) / 评论(0) 分类 cctv9英语新闻2016年

The ways successful people defeat procrastination. 成功人士战胜拖延的方法。 They give up. 他们会放弃 Just because you already poured hours into a project, doesn't mean you need to finish it. This is known as the sunk cost fallacy. Th

发表于:2019-03-06 / 阅读(107) / 评论(0) 分类 英语听力广播—Listening
学英语单词
abandoned land
above and beyond the call of duty
anuwats
armed riots
arrangement in parallel
asynchronous communication interface
audio tracks
berailroaded
Breit-Tuve's theorem
bridge ratio resistance
carboxytransferase
chaulmoogryl alcohol
chin barbel
cold strip mill
colour fidelity
come out of nowhere
complementary convex program
consolidated accounts
cottage bread
cryptic mutant
damp blocking spleen Yang
decoupages
Department of Textitles
Duane syndrome
DYNAMOSPHERE
ecclesiasticism
electric installation
elliptic coordinates
empirical-rational
enechema
ether extract
event history data
factorships
flyweight
fuel return pipe port
gentiobiose
habit pattern interference
hardware origin
hoover digger
Ilex hirsuta
immodesty
indevour
indigo copper (covellite)
injection port
instruction execution phase
interferoetalon
iscoes
isothermal quench
jewish holy days
keyway broaching
kobilinsky
lenitive
limit of tidal current
list of lists
matrix operation
metrological certification
network of cutting-series
neutron depolarization effect
non interest bearing currency
nose wheelie
obes-
object value
objective lens adjustment
outfields
paper scarlet
parallel processing system evaluation board
pea-type
pectorimyon
Petrocosmea kerrii
photodechlorination
pisarev
pistillidia
polycondense
precise radar significant location
proteiform
radial convergence shift
reactionists
rollercoaster tycoon
self-exhibition
Shenmai
site grade level
son of a sea cook
staged
subtilise
surprisings
symmetrical wavelet
take someone red-handed
talk through one's neck
taxitic
tetanus nascentium
tetradecagons
the appalachian mountains
three-puttings
to do some shopping
trapezoid nucleus
unresistible
virtual size
white muscular disease
workboats
z-values
Zimmerwaldian
znik