简单重复序列多态性

Editors note: This is the third episode of four-part series on verb tenses. Be sure to listen to part one and part two first. For VOA Learning English, this is Everyday Grammar. Today we are going to talk about the perfect verb tenses. Perfect tenses

发表于:2018-11-27 / 阅读(529) / 评论(0) 分类 2016年VOA慢速英语(十二)月

Section A [00:01.23]1. M: I haven't decided which subject to major in [00:04.96]physics or chemistry. [00:07.76]W: It isn't easy to choose,is it? [00:10.21]Q: What does the woman mean? [00:13.87]2. W: The map shows that this street goes downtown. [00

发表于:2018-11-29 / 阅读(315) / 评论(0) 分类 决胜四级听力必备

Section A [00:01.54]1. M: My grandpa died in 1978. I was 18 years then. [00:08.20]W: That means he would be 76 if he were alive. [00:11.49]Q: How old was his grandpa when he was dead? [00:14.45]2. M: Why are you going so fast? [00:17.53]Where are you

发表于:2018-12-01 / 阅读(359) / 评论(0) 分类 决胜六级英语听力

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Its the time of year to take a look backand thats just what the journal Science did as they listed their most important breakthroughs of 2008. At the v

发表于:2018-12-02 / 阅读(220) / 评论(0) 分类 Scientific American(十二)月

图片 by Jason Marshall Its not often someone suggests that knowing some math could make you the life of the party, but thats exactly what Im going to do. Yes, a properly timed delivery of a few fun facts about the famed Fibonacci sequence just migh

发表于:2018-12-07 / 阅读(217) / 评论(0) 分类 数学英语

[ti:UNIT 7 Enjoy Your Hobby Lesson 56:Unit Review] [0:01.051]Unit 7 [0:02.631]Enjoy Your Hobby [0:04.894]Lesson 56: [0:06.943]Unit Review [0:08.907]I. [0:10.231]Building Your Vocabulary [0:12.963]A. [0:14.500]Fill in each blank with the proper word o

发表于:2018-12-10 / 阅读(218) / 评论(0) 分类 河北教育初中英语(初中起点)八年级上

陈豪在北京的ABC美国公司工作,美籍华人Mary离开后,他马上结识了公司新来的美国同事Amy。看,他们正在喝下午茶。 (Office ambience) C: Hi, Amy. 你在这儿太好了。我正好有个问题要请教你。 A: W

发表于:2018-12-11 / 阅读(138) / 评论(0) 分类 商务英语

发表于:2018-12-12 / 阅读(153) / 评论(0) 分类 医务英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The human genome was sequenced, and in the process of moving that forward the technology that was developed was incredible. And because of their efforts in human genome,

发表于:2018-12-24 / 阅读(273) / 评论(0) 分类 Scientific American(十)月

Describing Order and Sequence Patrick: Okay, your first task is to put all of these files in order. Maya: Wow, there must be hundreds of files in this storeroom. How am I supposed to organize them? Patrick: Create a basic filing system. Put things in

发表于:2018-12-27 / 阅读(207) / 评论(0) 分类 2014年ESL之商务英语

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

发表于:2019-01-02 / 阅读(310) / 评论(0) 分类 数学英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky, got a minute? Neandertals were our closest relatives. And now we know a lot more about them. Because researchers have for the first time sequenced a complete Neandertal genomethat of

发表于:2019-01-08 / 阅读(249) / 评论(0) 分类 Scientific American(八)月

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? Robin Williams thought that the platypus was cobbled together by an inebriated deity: Lets take a beaver. Lets put on a ducks bill. Now we know how weird the platypus is

发表于:2019-01-08 / 阅读(229) / 评论(0) 分类 Scientific American(五)月

陈豪在北京的ABC美国公司工作,美籍华人Mary离开后,他马上结识了公司新来的美国同事Amy。看,他们正在喝下午茶。 (Office ambience) C: Hi, Amy. 你在这儿太好了。我正好有个问题要请教你。 A: W

发表于:2019-01-11 / 阅读(159) / 评论(0) 分类 礼节美语

由于传统的英语教学里面不涉及小作文的内容,所以雅思写作的小作文部分一直是很多同学的软肋。不会说名称,不知如何分析对比,即使有思路却不知如何表达,成为很多同学的问题。下面

发表于:2019-01-18 / 阅读(231) / 评论(0) 分类 雅思英语

古埃及金字塔是奴隶制帝王的陵墓,最宏大的当为吉萨三座大金字塔。塔基呈方形,每边长230米,高146米,用230余万块巨石(每块平均重达2.5吨)垒成,国王墓室用一块400吨重的石板垒成。整体规

发表于:2019-02-01 / 阅读(182) / 评论(0) 分类 阅读空间

BEIJING, Aug. 22 (Xinhuanet) -- Researchers have discovered how a human egg captures an incoming sperm for fertilization, paving the way to help couples suffering from infertility, according to media reports on Monday. An international team of resear

发表于:2019-02-08 / 阅读(246) / 评论(0) 分类 英语新闻

Listen to the schedule of a business trip. Fill in numbers l-8 to point out the sequence of the schedule. I'm leaving for Milan on the 7th of June. l'II arrive there on the 8th evening at about 7:OOpm. Then, l'II take a shuttle bus to the hotel. On t

发表于:2019-02-17 / 阅读(181) / 评论(0) 分类 英语听力练习题

Listen to the dialogues and write the correct sequence of l-6 as mentioned in the dialogues. A:How do I search books from the computer? B:First, key in your PIN number. Then, it goes to the Library's Homepage. Then, you can choose any way you want to

发表于:2019-02-17 / 阅读(162) / 评论(0) 分类 英语听力练习题

Thank you for being here,Fareed.Nice to have you on the show. 多谢你抽空前来 法里德 很高兴你能来上节目 Let's get started first with your background.I do think I know a lot about you. 首先聊聊你的背景 我觉得我很了解你

发表于:2019-02-23 / 阅读(222) / 评论(0) 分类 柯南脱口秀
学英语单词
addis derra
affection of pons
air-core(d)betatron
alternate tooth slot milling cutter
approximatintegration
autographa
back-and-forth
baity
bear a reference to
Becke's sign
Briceni
cadizs
capital of Malawi
catheterism
ciliarybody
convective mixing
crosswise bar of abacus
cryogenic refrigerator
delude
division by factors
doable
domestic bird fowl
Dornstadt
epharmonic form
epiasma
eumenorrhoea
fancy pastry
focussed spot diameter
foreign money order
frequency scan antenna
from all quarter
frontal sutures
galliferous
galosemide
getting away with
home-brew
horophile
idea generation system
inter-current
jambas
Jena-glass
kayans
Kaysersberg
key descriptor block
Lacha, Ozero
legal procedures
leota
literary standard
loadage
loam mo(u)lding
maatsuyker is.
magnetizing of transducer
magneto-optical disk drive
magnoferrite
main-liner
metalleity
minus allowance
molysite
monopyle
Naast
newborn screening
Noncurrent asset
nonsegregated phase bus
oppressiveness
outboard brake
pharyngeal rash
polystichum piceopaleaceum
port-town
power boards
PowerPointing
preadipocytes
program memory
Rajidae
random rehash method
real time demand
recurrent group
refined bitumen
reinforcing member
reticulum multipotential cell
round copper wire
satellite automonitor system
sheffer stroke gate
single one
sinu(so)-
spatial inhomogeneity
special crossed cheque
spinodal phenomenon
stock tank oil
strokeed
su symmetry
switchyards
Te Nggano, L.
teasdales
tild
underwater nuclear blast
urinater
vigilancia
vyalsovite
waai
wall-type heat exchange
work up period
young stand