4-羟基异喹胍,4-羟基胍喹定

AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster -- English teacher Lida Baker joins us from Los Angeles to talk about phrasal verbs. The first word is a verb. The second word, sometimes even a third, is usually a preposition. Ph

发表于:2018-12-04 / 阅读(39) / 评论(0) 分类 词汇大师(Wordmaster)

AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster -- English teacher Lida Baker joins us from Los Angeles to talk about phrasal verbs. RS: The first word is a verb. The second word, sometimes even a third, is usually a preposition

发表于:2018-12-30 / 阅读(81) / 评论(0) 分类 词汇大师(Wordmaster)

Grammar Girl here. Today, guest-writer Bonnie Trenga helps us understand modifiers that come at the beginning of a sentence. Bonnie says, As a guest-writer, I plan to talk about two kinds of troublesome modifiers that begin a sentence. Like many of y

发表于:2019-01-02 / 阅读(55) / 评论(0) 分类 英语语法 Grammar Girl

Grammar Girl here. Listen up, everyone! Todays topic is phrasal verbs, as in to listen up. And now, guest-writer Bonnie Trenga writes, a listener, Paulino from Minneapolis, would like to know what phrasal verbs are and why they are called that. Phras

发表于:2019-01-02 / 阅读(59) / 评论(0) 分类 英语语法 Grammar Girl

After you have greeted your guests, you will begin to go through the main body of your presentation. It's very useful to have some visual aids - some slides, pictures or graphs that help explain what you are saying. Sometimes they can also help to k

发表于:2019-01-07 / 阅读(119) / 评论(0) 分类 英语讨论

Zahra' Langhi 曾是利比亚愤怒日运动的一员。愤怒日运动有助于推翻卡扎菲专制政府,然而利比亚之后又该何去何从呢?在利比亚的第一次大选中,人们尝试创新了候选人名单交叉式候选人名单,

发表于:2019-02-05 / 阅读(32) / 评论(0) 分类 TED公开课:世界权势大转移