[化] 草枯醚

美国国家公共电台 NPR Fentanyl-Laced Cocaine Becoming A Deadly Problem Among Drug Users

NOEL KING, HOST: There is a frightening new dimension to the opioid crisis. People who are using cocaine are overdosing, not on cocaine but on fentanyl. Fentanyl makes heroin even more dangerous, and now it's showing up in cocaine as well. And that c

发表于:2018-12-01 / 阅读(225) / 评论(0)

2018年NPR美国国家公共电台3月

麻省理工学院公开课：单变量微积分03：求导四则运算及三角函数导数

分集介绍：导数，商数，正弦和余弦 Derivatives.of.products.quotients.sine.cosine

发表于:2019-01-05 / 阅读(429) / 评论(0)

麻省理工学院公开课：单变量微积分

麻省理工学院公开课：单变量微积分01：导数和变化率

分集介绍：导数，斜率，速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(448) / 评论(0)

麻省理工学院公开课：单变量微积分

英语游戏:愚蠢的香肠

[全屏观看] 点击右键- 另存为可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏，它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标

发表于:2019-01-08 / 阅读(284) / 评论(0)

英语对接游戏

美国国家公共电台 NPR An Even Deadlier Opioid, Carfentanil, Is Hitting The Streets

An Even Deadlier Opioid, Carfentanil, Is Hitting The Streets play pause stop mute unmute max volume 00:0003:27repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plu

发表于:2019-01-16 / 阅读(223) / 评论(0)

2016年NPR美国国家公共电台9月

HEALTH REPORT - New Heart Drug Shows Promise in African Amer

HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure

发表于:2019-01-30 / 阅读(235) / 评论(0)

健康与经济

2006年VOA标准英语-Israel's Olmert Says No Timeframe on Gaza Offen

By Jim Teeple Jerusalem 05 November 2006 Palestinian women mourn during funeral of brothers Ayman and Raed Yassin in Beit Lahia, November 4, 2006 Israel's prime minister, Ehud Olmert, on Sunday said the military operation in Gaza is not open-ended,

发表于:2019-02-01 / 阅读(236) / 评论(0)

2006年VOA标准英语（十一月)

China reviews anti-dumping measures on Japanese chloroprene rubber

BEIJING, Aug. 8 (Xinhua) -- China on Wednesday started to review anti-dumping measures it imposed on chloroprene rubber imported from a Japanese company, the Ministry of Commerce said. The move came after the ministry received complaints that Japan E

发表于:2019-02-05 / 阅读(260) / 评论(0)

英语新闻

VOA标准英语2010年-California Company's 'Green' Cement Ca

Cement is a major component of concrete, the world's most widely used man-made material, an integral part of roads, bridges and buildings. But making cement requires heating limestone and other materials to very high temperatures, a process that rele

发表于:2019-02-08 / 阅读(280) / 评论(0)

VOA标准英语2010年(一月)

学个词 Learn a Word-VOA英语教学 2937 fentanyl

今天我们要学的词是 fentanyl. Fentanyl 芬太尼。U.S. President Trump said he would raise the issue of the flood of cheap and deadly fentanyl when he meets Chinese President Xi Jinping. 美国总统川普说，他见到中国国家主席习近

发表于:2019-02-16 / 阅读(220) / 评论(0)

英语单词荟萃

听播客学英语 139 多丽丝·莱辛

Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

发表于:2019-02-19 / 阅读(170) / 评论(0)

听播客学英语

2016年CRI China Releases First-batch Images Captured by Gaofen-4 Satellite

The State Administration of Science, Technology and Industry for National Defense released 17 pictures captured by Gaofen-4 on Wednesday, covering an area of at least 400 kilometers. The project's chief designer, Tong Xudong, said Gaofen-4 is in good

发表于:2019-02-21 / 阅读(208) / 评论(0)

2016CRI中国国际广播电台

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abscondments

accountable warant

actual weather cross section

backward-wave parametric amplifier

balance piece

Birket Fatmé

black - eyed peas