面积抽样法,分布区取样

美国大选结束了,各种拉票和选战活动也终于告一段落。就拿我们家附近的教会来说,他们现在不用再向教友推荐应该给哪个候选人投票了。 美国禁止宗教机构支持某一候选人,不过有些教会

发表于:2018-12-01 / 阅读(215) / 评论(0) 分类 美国习惯用语

by Jason Marshall The last article about how to use math to send encrypted messages ended with a bit of a cliffhanger. The good news is that you will soon find out how the story ends. But, as I warned last time, the bad news is that that isnt going t

发表于:2018-12-07 / 阅读(131) / 评论(0) 分类 数学英语

A: I would like to speak with the manager about some safety concerns. B: This is the manager. What can I do for you? A: I was parking my car last night in the garage area, and it was very dark out there. B: Is this the first time you noticed this? A:

发表于:2018-12-26 / 阅读(173) / 评论(0) 分类 租住公寓-Renting an Apartment

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(197) / 评论(0) 分类 商务英语必备1000字

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(191) / 评论(0) 分类 财会英语

A: I had a problem last night in the parking lot and would like to speak to the manager. B: This is the manager speaking. How can I help you? A: I got out of my car in the parking area, and the area was not lit very well. B: How long have you noticed

发表于:2019-01-05 / 阅读(147) / 评论(0) 分类 地道英语对话-租房

A: I would like to speak with the manager about some safety concerns. B: This is the manager. What can I do for you? A: I was parking my car last night in the garage area, and it was very dark out there. B: Is this the first time you noticed this? A:

发表于:2019-01-05 / 阅读(158) / 评论(0) 分类 地道英语对话-租房

By Cynthia Kirk Broadcast: November 22, 2003 This is Steve Ember with In the News from VOA Special English. Trade ministers from the Americas gathered in Miami, Florida, this week to discuss plans for

发表于:2019-01-06 / 阅读(180) / 评论(0) 分类 VOA2003(下)-教育与新闻

A: I had some concerns about the pool and Jacuzzi area and would like to speak with someone. B: I can help you with that. What are you having problems with? A: I live right next to the pool, and late at night it is really noisy out there! B: There is

发表于:2019-01-07 / 阅读(108) / 评论(0) 分类 地道英语对话-租房

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. VOICE TWO: Northern Lights seen near Palmer, Alaska last year And I'm Barbara Klein. On our program this week, we will tell about the mystery of the aurora borealis, bet

发表于:2019-01-11 / 阅读(161) / 评论(0) 分类 VOA慢速英语2008年(九)月

Sunday marks the first anniversary of China's Xiongan New Area, which is designed to become the core driving force for coordinated development in the Beijing-Tianjin-Hebei region. As CRI's Guan Chao reports, rapid progress has been made in the develo

发表于:2019-01-19 / 阅读(141) / 评论(0) 分类 2018CRI中国国际广播电台

Todd: Well, what about Area 51? Jonathan: Area 51 i something people always talk about. I'm not really sure what to believe but I essentially think that something's that's a secret that large could never be covered up for such a long period of time.

发表于:2019-01-20 / 阅读(190) / 评论(0) 分类 原版英语对话1000个

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(122) / 评论(0) 分类 天天商务口语

发表于:2019-02-01 / 阅读(166) / 评论(0) 分类 财会英语

One of the challenges the new economic zone faces is wetland preservation as in the middle of the area lays the largest freshwater reserve in Hebei province. 143 lakes, covering 360 square kilometers.... The Baiyangdian wetland is the largest freshwa

发表于:2019-02-05 / 阅读(135) / 评论(0) 分类 cctv9英语新闻2017年

The search area for the victims has been extended from the site of the capsizing to where the Yangtze River meets the sea in Shanghai, about 1,400 kilometers. Police have also begun a thorough search along the banks of the river. The search teams hav

发表于:2019-02-05 / 阅读(166) / 评论(0) 分类 cctv9英语新闻2015年

DAR ES SALAAM, June 23 (Xinhua) -- Turkey has expressed interest to create a free-trade and investment area between Turkey and the East African Community (EAC), Xinhua learnt on Wednesday. Turkish Ambassador(大使) to Tanzania Sander Gurbuz said his

发表于:2019-02-07 / 阅读(155) / 评论(0) 分类 英语新闻

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(134) / 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(149) / 评论(0) 分类 实用英语

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(149) / 评论(0) 分类 英语口译
学英语单词
acqualung
antedation
ascriptively
atypical gonadal dysgenesis
Bainyik
bernoullic's equation
block course
Bol'shoy Yug
buffering control
button trees
center control
cesky dub
cleomis marginicollis
cmptr
competitin
conservation theory
cunningly
cyclic
damping deflection period
depreter
descriptive malacology
double-strand mill
drop-lubrication
electrically mass filter
enform
flat-four
FPRI
fulll and by
GIGO
Groeco's triangle
gussied
hasselbach
hastler
highland scots
hill holder
hypoiodidism
i-lad
iloperidone
inimitative
integrity test
internal shrinkage (cavity)
jamming roller
juke joints
key file organization
Kozyrevka
laser alignment instrument
Linguatula
lonsdaleite
Macallisterite
main picture monitor
manual program
marketing objectives
Mastigophoraceae
method of unit loads
michalak
micro-hardness testing
mobile sprinkler line
moiley
morindadiol
mouldering
musha
Negrophilist
net-winged beetle
neuroepidemiological
nickel-based
nightglows
noise equivalent power (nep)
nounness
oldham coupling
paint locker
paleogeology
Paluan
paragraph control
Parly.
pavement forming
performance index
Phlebotomus suni
phrygian scale
Pidansǒm
pound-lien
quote image
rainbow chalcedony
Remote Media Streaming
rheumatiod arthritis
scufflings
sensor material
setae
shokeid
spectral reflectance factor
spring balance
Symphyta
tannic acids
three course system
tooth extraction wound
triaryl methyl
trichofolliculomas
udhk
vibrating-contact voltage regulator
voidablest
which direction
with pride
Wohl-Ziegler reaction