交错抽样;盘旋抽样

Lesson 38 calendar 历法,日历 Up to now,historians have assumed that calendars came into being 迄今为止,历史学家一直认为日历是随农业出现而产生的, with the advent of agriculture, for then man was faced with a real need

发表于:2018-11-27 / 阅读(1232) / 评论(0) 分类 新概念英语词汇随身听手册3

Unit 04 Big Tom55 大个子汤姆 我至今怀念与同事大个子汤姆一起的时光,他身体强壮却从不盛气凌人,有时候冒出的奇特想法让人莫名其妙却又无法拒绝。然而,一次随意的决定使他遭受了生命危险 Of all the males in our companys dormitory, I felt the most affection fo

发表于:2018-12-04 / 阅读(250) / 评论(0) 分类 2006年星火30篇考研词汇

Text In 1976, during America's bicetennial celebration, a family decided to travel to the American West instead of joining the majority of people that were celebrating on the East Coast. They wanted t

发表于:2018-12-04 / 阅读(314) / 评论(0) 分类 大学英语精读第四册

Many countries, including Australia, Britain and Canada, have privatised air-traffic services or turned them into state-owned firms. 许多国家,包括澳大利亚、英国和加拿大,已经私有化的空中交通服务或转为国有企业。

发表于:2018-12-05 / 阅读(207) / 评论(0) 分类 经济学人商业系列

Lesson 39:Nothing to worry about 不必担心 Listen to the tape then answer the question below. 听录音,然后回答以下问题。 What was the difference between Bruce's behaviour and that of other people? The rough across the plain soon became

发表于:2018-12-08 / 阅读(654) / 评论(0) 分类 新概念英语第三册

There is a town at the top of the Holy Land with a name like a boy'sDan. 圣地的顶端有一个小镇,镇的名字像一个男孩子的名字但; Down at the bottom of the Holy Land is another town called Beersheba; 圣地的底端还有一个城

发表于:2018-12-29 / 阅读(198) / 评论(0) 分类 美国学生世界地理教材

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 knit [ nit ] Mother is knitting a swea

发表于:2018-12-30 / 阅读(204) / 评论(0) 分类 每日攻克5词

QC procedure 品管流程 What issues do we need to address to work out new QC procedures? 在制定新品管流程之前,有哪些問題必須先處理? quality standard 品質標準 This year, Metro Factory experienced a noticeable decline in q

发表于:2018-12-31 / 阅读(284) / 评论(0) 分类 商务英语必备1000字

Now, an ambitious new idea began to take hold in Lewis Williams' mind because he was aware that there were other rock paintings which were very similar to those painted by the San. These were many tho

发表于:2019-01-02 / 阅读(231) / 评论(0) 分类 人、艺术、世界

1.audit 审计 2.attestation 鉴证 3.credibility 可信赖程度 4.audit of financial statements 财务报表审计 5.agreed-upon procedures 执行商定程序 6.high levels of assurance 高水平保证 7.compilation 编制 8.reliability 可靠性 9

发表于:2019-01-03 / 阅读(278) / 评论(0) 分类 财会英语

1.Bending 弯曲 A: What kind of parts do you usually need to bend? B: Tubular parts or stampings. A:什么样的零件一般需要进行弯曲加工? B:管状零件或冲压件。 2.Cycle time 工作周期 A: What is the cycle time of the injection molding machine? B: Three

发表于:2019-01-21 / 阅读(204) / 评论(0) 分类 天天商务口语

Next to these brightly colored paintings you often see lots of tiny pictures of all sorts of things, 在这一排排彩色画像的旁边,你往往会看到许多画着各种各样的东西的小画像, such as owls and little people, flags, flow

发表于:2019-01-29 / 阅读(185) / 评论(0) 分类 世界小史

发表于:2019-02-01 / 阅读(228) / 评论(0) 分类 财会英语

Precise length of Great Wall: 21,196.18 km Precisely, how long is the Great Wall? This has been a long-unanswered question, as many dynasties in Chinese history built, modified or extended the Great Wall. But now, the State Administration of Cultural

发表于:2019-02-05 / 阅读(189) / 评论(0) 分类 英语新闻视频

It's a stat that gets bounced around as e-mail-forward wisdom: men think about sex every seven seconds. Even when the idea lacks this mythical specificity and grandiosity (that's 7,200 times a day!), the idea that men think about sex basically all th

发表于:2019-02-17 / 阅读(197) / 评论(0) 分类 阅读空间

natality 生育 fertility 生育率 fecundity 生育能力 birth rate, natality rate 出生率 births 出生人数 parity 胎次 premature birth 早产 life birth 活产 stillbirth 死产 birth peaks 出生高峰 mortality 死亡 mortality rate 死亡率

发表于:2019-02-18 / 阅读(218) / 评论(0) 分类 实用英语

发表于:2019-02-18 / 阅读(211) / 评论(0) 分类 考研英语

left-skewed 左偏 negative-skewed 负偏 right-skewed 右偏 positive-skewed 正偏 contingency table 列联表 sampling distribution (of a statistic)(某个统计量的) 抽样分布point estimate 点估计值 point estimator 点估计式 unbiased

发表于:2019-02-18 / 阅读(204) / 评论(0) 分类 英语口译

英语中有一种很有意思的词汇和叠词类似,是由两个结构相近、尾音相似的词语组合,可作为形容词、副词、动词或名词。因为读起来琅琅上口,很有节奏感,这类词便被称为叠声词。他们结

发表于:2019-02-20 / 阅读(221) / 评论(0) 分类 卡卡课堂早餐英语

The Alaska Pipeline The Alaska pipeline starts at the frozen edge of the Arctic ocean. It stretches southward across the largest and northernmost state in the United States,ending at a remote ice free seaport village nearly 800 miles from where it be

发表于:2019-02-25 / 阅读(212) / 评论(0) 分类 双语有声阅读
学英语单词
absentmindedly
alkali albuminate
amenorrheae
applied sciences
Argidae
artificial population
ashton kutcher
axial load on horizontal pipe
badders
ballastron
be freaked out
biconvexus
Bodolz
buttercup family
Campeche, B.de
cavity reflector alignment
chamelirin
coil tube
combinatoriality
commercial discounts
common digital extensor muscle
common maritime adventure
diagnosable
dimensional synthesis
drop jerk
egyption
Endingen
energy-poor phosphate bond
English violet
equivalence of fiber bundles
erythroid differentiation factor
facies colica
fanac
favourable receptions
fire-proof grease
flow-table test
forecaddied
gear tipping
hardness of water
heat and sweat damage
HEPA filter (high efficiency particulate air filter)
Herjaadalen
imler
insect pollination
instapreneur
kingpins
known the score
Koumbia
lactivorous
leptomeningeal angiomatosis
logic stepping device
Loudes
massive phase
megavolt ampere
mellewelles
mol/l
multicast group
muskego l.
mussel shrimp
neat work
one-one
Opimian
oral evidence
Oswego
overcast sky
philomenes
phytogenology
pig-a-back
pulse transmission tester
quieteners
reconnoitering
record-keeping system
remer
rescue effect
rikleen
sanguinian
Sciadopityspollenites
setaria labiatopapillosa
sherna
Ships Agency
significant graduation
Sorbarin
specific gravity of blood
spects
spermatogenous cell
stack molding
subtle structure
swine paratyphoid
Tayto
telsons
throw a race
Toppur
Turner's Pen.
tyrein
unconstraint
unprotected
unstruggling
up fold
weather proof enclosue
what's the point
wilful negligence
working peasantry