模式染色体数;在一分类群中最常见的染色体数

Standard usage includes those words and expressions understood, used, and accepted by a majority of the speakers of a language in any situation regardless of the level of formality. As such, these words and expressions are well defined and listed in

发表于:2018-11-27 / 阅读(842) / 评论(0) 分类 新概念优美背诵短文50篇

Lesson 38 Text A Can't She Type? The well-known banker, T. J. Ellington, was at one time in his younger days the manager of a New York office. His secretary had been with him for many years, and knew

发表于:2018-12-02 / 阅读(352) / 评论(0) 分类 初级口语教程

A: How may I help you? B: I need to get on the Internet. A: Do you have your library card with you? B: Yes, I have it. A: Youre going to have to wait for a computer. B: Thats okay. A: Please put your name on this list. B: Then what do I need to do? A

发表于:2018-12-02 / 阅读(144) / 评论(0) 分类 英语情景对话-图书馆

A: What can I do for you today? B: I would like to use a computer. A: Do you have your library card? B: I sure do. A: There is a wait for the computers. B: Thats all right. A: You need to print your name on this list. B: Okay. Now what? A: Once a com

发表于:2018-12-02 / 阅读(189) / 评论(0) 分类 英语情景对话-图书馆

Bella: What's your blood type, Luke? Luke: It's A, I think. Why do you ask? Bella: Well, mine's B. Luke: So? Bella: They say people with A blood type get along very well with those with B blood type. Luke: Really? 你是什么血型? 贝拉:卢克,

发表于:2018-12-08 / 阅读(506) / 评论(0) 分类 赖世雄初级美国英语

VOICE ONE: I'm Shirley Griffith. VOICE TWO: And I'm Doug Johnson with the VOA Special English program, PEOPLE IN AMERICA. Today we tell about Katharine Graham. She was the owner and publisher of The Washington Post newspaper. (MUSIC) VOICE ONE: Kath

发表于:2018-12-15 / 阅读(168) / 评论(0) 分类 VOA慢速英语2009年(四)月

BARBARA KLEIN: Im Barbara Klein. STEVE EMBER: And Im Steve Ember with PEOPLE IN AMERICA in VOA Special English. Today we remember the singer and actress Lena Horne. She helped break racial barriers by changing the way black women were represented in

发表于:2018-12-16 / 阅读(154) / 评论(0) 分类 2010年VOA慢速英语(五)月

PEOPLE IN AMERICA - Gwendolyn Brooks, 1917-2000: First African-American to Win a Pulitzer Prize for Literature SHIRLEY GRIFFITH: Im Shirley Griffith. SARA LONG: And Im Sarah Long with the VOA Special English program, PEOPLE IN AMERICA. Today we tell

发表于:2018-12-16 / 阅读(129) / 评论(0) 分类 2012年VOA慢速英语(六)月

发表于:2018-12-30 / 阅读(192) / 评论(0) 分类 自考英语(一)78讲

发表于:2019-01-02 / 阅读(317) / 评论(0) 分类 知性英语

PEOPLE IN AMERICA - Katharine Graham, 1917- 2001: She Was the Powerful Owner and Publisher of The Washington Post VOICE ONE: I'm Shirley Griffith. VOICE TWO: And I'm Doug Johnson with the VOA Special English program, PEOPLE IN AMERICA. Today we tell

发表于:2019-01-12 / 阅读(183) / 评论(0) 分类 2013年VOA慢速英语(四)月

PEOPLE IN AMERICA - Buffalo Bill Cody, 1846-1917: He Represented the Spirit and Tradition of the American West GWEN OUTEN: Im Gwen Outen. DOUG JOHNSON: And Im Doug Johnson with PEOPLE IN AMERICA in VOA Special English. Today, we tell the story of a m

发表于:2019-01-12 / 阅读(201) / 评论(0) 分类 2012年VOA慢速英语(六)月

PEOPLE IN AMERICA - Barbara Cooney, 1917-2000: She Created Many Popular Books for Children MARY TILLOTSON: Now, the VOA Special English program, PEOPLE IN AMERICA. Today, Shirley Griffith and Steve Ember tell about the life of Barbara Cooney, the cre

发表于:2019-01-12 / 阅读(187) / 评论(0) 分类 2012年VOA慢速英语(二)月

PEOPLEINAMERICA-LenaHorne,1917-2010:AStarWhoBrokeRacialBarriers BARBARA KLEIN: Im Barbara Klein. STEVE EMBER: And Im Steve Ember with PEOPLE IN AMERICA in VOA Special English. Today we remember the singer and actress Lena Horne. She helped break raci

发表于:2019-01-12 / 阅读(251) / 评论(0) 分类 2011年VOA慢速英语(十)月

Diabetes in Lab Mice Reversed with Natural Compound The International Diabetes Federation has released data (this week) that indicates the number of people living with diabetes around the world will likely rise from 366 million to 552 million by 2030

发表于:2019-01-13 / 阅读(144) / 评论(0) 分类 VOA标准英语2011年(十一月)

Here are nine words that you might think are recent additions to the language, but have actually been spoken and written. 如下九个词也许你会以为是英语语言的新词,其实很早就开始有人说有人写了。 1. X factor (1930)

发表于:2019-01-17 / 阅读(266) / 评论(0) 分类 实用英语

Unit 14 第十四单元 Conversation 1 会话 1 A:It's so earlier this morning,Mr. Li! You just came back yesterday, you should have rest much more. A:李先生今天这么早啊!你昨天才刚回来,你应该多多休息。 B:I'd like to have r

发表于:2019-02-08 / 阅读(178) / 评论(0) 分类 巧嘴秘书情景对话

RACHEL MARTIN, HOST: As we near the end of 2013, NPR is taking a look at the numbers that tell the story of this past year; numbers that if you really understand them, can give insight into the world we're living in right now. Over the next two weeks

发表于:2019-02-23 / 阅读(175) / 评论(0) 分类 英语语言学习

A: What can I do for you today? B:I would like to use a computer. A: Do you have your library card? B: I sure do. A: There is a wait for the computers. B: That's all right. A: You need to print your name on this list. B: Okay. Now what? A:Once a comp

发表于:2019-02-27 / 阅读(207) / 评论(0) 分类 在图书馆-At the Library

Bella: Whats your blood type, Luke? 贝拉:卢克,你是什么血型? Luke: Its A, I think. Why do you ask? 卢克:我想是A型。你问这干嘛? Bella: Well, mines B. They say people with A blood type get along very well with those with

发表于:2019-02-27 / 阅读(262) / 评论(0) 分类 天天练口语
学英语单词
a strong stomach
actual mass value of a weight
aft-poppet
air-express
alate winged
alerce
allotranasplantation
anterior thyro-arytenoid ligament
anti-personnel
Artemisia annua
beam-angle-between-half-power-points
binary vector
blast-furnace melting operation
broiling
bulkhead flange
byung
calzone
camp run
chili wrapper
clash
cluster rack assembly
complex hilbert space
conditon
conjunctions
coprime
crushed granite
crystallographic space group
cyanoformic ester
cycle count code
data circuit termination equipment waiting
discharge current capacity
diseased
disembowellings
dump database command
ejection force
electro-polarized relay
end-pumping laser
entry date
excise man
exposure to a single party
family sapindaceaes
felis tigrinas
finished product blending
frequency monitoring and interference control
general staff
had advantages over
helical rake angle
himantopuses himantopuses
hot pressed ceramics
injury of elbow fascia
instant dimmer memory
intercepted resource
Iowa Point
J-strap
kimlin
logic structure
long-range optical camera (loroc)
machinery alarm system
main tail
making a move
Matakana
mega-investors
mesochloa
MODU code
mosaicking board
nippon telegraph and telephone
nonvegetated
played
position specializing in reception
primartumor
Primula sieboldii
program sensitive error
quinquertium
Reade Peak
reduction index
response window
retarded vector potential
Roland circle
rolyn
Saraca
sarcodine
Shrovetides
sock it to someone
split order
spurge olive
steering clutch control butt
syncerus
tachometer sender
thirteen-year-old
thraves
trading unit
traditional algorithm
Triostium perfoliatum
tsuga mertensianas
unrecorded deposits
urge to merge
vectorial property
ventralwards
water rails
Wellawaya
wiring connector
worenine