[数] 链复形的正合序列

决胜四级听力必备 unit17

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(151) / 评论(0)

决胜四级听力必备

决胜六级听力必备 mode19

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(171) / 评论(0)

决胜六级英语听力

SSS 2008-12-31

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(96) / 评论(0)

Scientific American(十二)月

数学英语 25 What is the Fibonacci Sequence

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(105) / 评论(0)

数学英语

UNIT 7 Enjoy Your Hobby Lesson 56:Unit Review

[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(112) / 评论(0)

河北教育初中英语（初中起点）八年级上

专业术语—基因专业词汇R/S

发表于:2018-12-12 / 阅读(48) / 评论(0)

医务英语

SSS 2011-10-21

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(135) / 评论(0)

Scientific American(十)月

轻松英语之旅24:OAKA(The Athens Olympic Sports Complex)

[00:02.54]English Express [00:28.11]OAKA - The Athens Olympic Sports Complex [00:31.40]雅典奥运会场馆 [00:43.42]The Athens Olympic Sports Complex (OAKA) [00:47.09]is situated at Maroussi [00:48.97]and was the centre of the Olympic Games 2004.

发表于:2018-12-26 / 阅读(133) / 评论(0)

轻松英语之旅

2014年ESL之商务英语 18 Describing Order and Sequence

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(95) / 评论(0)

2014年ESL之商务英语

数学英语 26 What is the Golden Ratio

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(183) / 评论(0)

数学英语

103.An Exact Number

A tourist was visiting New Mexico and was amazed at the dinosaur bones lying about.

发表于:2019-01-03 / 阅读(212) / 评论(0)

英汉幽默故事选读

SSS 2008-08-07

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(99) / 评论(0)

Scientific American(八)月

SSS 2008-05-13

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(100) / 评论(0)

Scientific American(五)月

学个词Learn a Word 第1741 chain

今天我们要学的词是 chain。Chain 除了大家都知道的，有锁链的意思，还有连锁店的意思。The American drug store Walgreens became the first retail store chain to expand its services to include diagnosing and treating patie

发表于:2019-01-09 / 阅读(134) / 评论(0)

英语单词荟萃

Horse meat found in pasta of German supermarket chain

COPENHAGEN, Feb. 18 (Xinhua) -- German supermarket chain Lidl in Denmark has found traces of horse meat in a pasta dish, the supermarket annouced late on Monday. A pasta dish called Combino Penne Bolognese from the manufacturer Copack has been found

发表于:2019-01-09 / 阅读(118) / 评论(0)

英语新闻

神秘的古埃及金字塔

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(69) / 评论(0)

阅读空间

Human fertilization process discovered

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(105) / 评论(0)

英语新闻

Lesson 9-2:Dates 日期

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(75) / 评论(0)

英语听力练习题

Lesson 55-1 In the Library 在图书馆

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(60) / 评论(0)

英语听力练习题

《柯南脱口秀》第60期:美国梦

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(64) / 评论(0)

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algorithmic measure of reliability

baseline shift in ac coupling