[化] 1,8-萘二酸酐; 1,8-萘二甲酸酐

naphthalic anhydride的用法和样例：

例句

The reaction adopted strong-acid cation exchange resin catalysed phthalic anhydride and butyl alcohol.采用强酸性阳离子交换树脂催化邻苯二甲酸酐与正丁醇的酯化反应。

Without a Nightligh

The moon shone down on the lake like a spotlight. It was a warm summer evening, and I found the night sky, with its 1) glistening stars, relaxing to watch. Five of us were sitting on the dock, wishing

发表于:2018-11-28 / 阅读(303) / 评论(0)

疯狂英语2002年

新标准初中英语七年级:UNIT1 Are you Li Jie

[00:00.00]Module 2 MY SHCOOL [00:06.21]UNIT 1 Are you Li Jie? [00:10.71]1 Look and listen.Then say. [00:16.37]Hello!I'm David Brown. [00:19.94]Hi!I'm Li Jie. [00:23.50]Hi!I'm Alice Brown. [00:26.55]What's your name? [00:28.97]I'm Tan Mei! [00:31.56]H

发表于:2018-12-04 / 阅读(188) / 评论(0)

外研社新标准初中英语七年级

365个英语简短小故事- 7. Does Garlic Mean Garlic?

Mike looked at the label on the big plastic container. It said Garlic Powder. There was a U with a circle around it after the word Powder. What does this U mean, Mike wondered. Under the word Powder was another word, Seasoning. Under that word was a

发表于:2018-12-06 / 阅读(195) / 评论(0)

365个英语简短小故事

John Pizzarelli Trio Releases Double-CD for 10th Anniversary

Doug Levine Forty-three-year-old jazz vocalist John Pizzarelli is one of today's top interpreters of the Great American Songbook. He's also a gifted composer and guitarist. This year John is celebrati

发表于:2018-12-08 / 阅读(163) / 评论(0)

VOA2004（上）--艺术专集

Funiculi, Funicula

Some think the world is made for fun and frolic And so do I, and so do I Some think it well to be all melancholic To pine and sigh, to pine and sigh But I, I love to spend my time in singing Some joyo

发表于:2018-12-11 / 阅读(214) / 评论(0)

VOA标准英语2014年(三月)

新目标初中英语九年级--Unit 7 Where would you li

Unit 7 Where would you like to visit? [00:04.88]SECTION A [00:07.84]1b Listen.Where would San,Gina,and Lydia like to go on vacation? [00:17.71]Why?Fill in the chart. [01:00.55]2a Listen and number these statements in the order that you hear them. [01

发表于:2018-12-17 / 阅读(292) / 评论(0)

新目标初中英语九年级(全一册)

初中三年级英语(人教新课标版)全一册 Unit 7 Where would you li

发表于:2018-12-29 / 阅读(218) / 评论(0)

人教新课标初中三年级英语

语感启蒙4 A-Tu-Li-Ta 阿图丽塔

图片1

发表于:2019-01-01 / 阅读(265) / 评论(0)

清华幼儿英语语感启蒙

VOA标准英语2008年-Russian Leader Says Georgian Conflict Complicat

Russian President Dmitri Medvedev says recent events in South Ossetia have complicated the country's financial markets, but there is no economic crisis. VOA Moscow Correspondent Peter Fedynsky reports. Russian President Dmitry Medvedev at a meeting

发表于:2019-01-31 / 阅读(181) / 评论(0)

VOA标准英语2008年（九月）

音乐咖啡厅:Tynisha Keli - Lullabye

音乐咖啡厅:Tynisha Keli - Lullabye 相关介绍：Tynisha Keli，原名Tynisha Keli Soares。1985年出生于美国，是一名RB歌手。2009年首张专辑The Chronicles of Tk在日本专辑排行榜拿下第15名，单曲 Shatter'd则在公告牌

发表于:2019-02-07 / 阅读(270) / 评论(0)

音乐咖啡厅

Napli won to chase Juventus

ROME, March 17 (Xinhua) -- Edison Cavani scored a brace as Napoli edged a nervy 3-2 win over Atalanta on Sunday and narrowed the gap between them and the Serie A leaders Juventus to nine points. Cavani ended his own six-week goal drought with an earl

发表于:2019-02-07 / 阅读(214) / 评论(0)

英语新闻

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 01

图片1 图片2 图片3

发表于:2019-02-11 / 阅读(199) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 03

图片1 图片2

发表于:2019-02-11 / 阅读(212) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 02

图片1 图片2

发表于:2019-02-11 / 阅读(223) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 05

图片1 图片2

发表于:2019-02-11 / 阅读(221) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 08

图片1 图片2 图片3 图片4 图片5

发表于:2019-02-11 / 阅读(234) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 07

图片1 图片2

发表于:2019-02-11 / 阅读(211) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 06

图片1 图片2

发表于:2019-02-11 / 阅读(207) / 评论(0)

加州英语分级G4

加州英语分级G4 Andrew Smith Hallidie Cable Car Inventor 04

图片1 图片2

发表于:2019-02-11 / 阅读(232) / 评论(0)

加州英语分级G4

音乐咖啡厅:Charli XCX - I Got It (Explicit)

Charli XCX Pabllo Vittar Miss cupcakke uh Big tits double D's No silicone and no saline Jealous of me Envious hoes in the all green Hater disease B**ches so sick of 'em Dramamine Bad Brooke Candy If you ain't mad well you 'bout to be I got it I got i

发表于:2019-02-21 / 阅读(245) / 评论(0)

音乐咖啡厅

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

bearing for lubricating pump