[无化] 硫化磷

CNN 2009-11-25

I couldn't get over this mess. The federal government is confirming what Joan Glickman of Pompano Beach, Florida suspected all along. Tainted drywall from China is giving off a harmful gas that's turning her air-conditioning wiring black, causing it

发表于:2018-12-20 / 阅读(113) / 评论(0)

cnn2009年(十一)月

60秒科学:Mercury Fillings Seem Safer over Time

Mercury Fillings Seem Safer over Time A study in the journal Chemical Research in Toxicology finds that mercury on the surface of dental fillings slowly turns to an inert sulfide compound, which should keep the mercury from harming the nervous system

发表于:2019-01-02 / 阅读(176) / 评论(0)

60秒科学

VOA标准英语2010年-Computer Model Helps Minimize Water Po

The US Environmental Protection Agency lists stormwater as the primary cause of water pollution in the United States. Roads, shopping centers and housing developments are generally seen as enhancing a community's quality of life. But they can also di

发表于:2019-01-07 / 阅读(98) / 评论(0)

VOA标准英语2010年(八)月

VOA慢速英语2015 撒哈拉沙漠的尘土吹到亚马逊雨林

AS IT IS 2015-03-15 Saharan Dust Feeds Amazon Rainforest 撒哈拉沙漠的尘土吹到亚马逊雨林 Large clouds of dust blowing off the Sahara desert can easily be seen from space. Joseph Prospero is with the University of Miami in the United Sta

发表于:2019-01-12 / 阅读(108) / 评论(0)

2015年VOA慢速英语(三)月

Garlic: The Key to a Long Life?

From VOA Learning English, this is the Health Lifestyle report. Garlic is one of the most common cooking ingredients around the world. Many dishes in Europe, Africa, Asia and the Americas use this strong-flavored vegetable. Garlic is similar to other

发表于:2019-01-12 / 阅读(160) / 评论(0)

2016年VOA慢速英语(十二)月

英语听力文摘 English Digest 505、不能不说的秘密

Black Tongues and Stomach Aches Don: Oh, no, Ya?l, I think I'm having a medical emergency. Quick! Call an ambulance. Ya?l: A medical emergency, Don? Are you sure? You look fine to me! D: But I'm not. This morning, I had a terrible stomach ache. And n

发表于:2019-01-26 / 阅读(105) / 评论(0)

英语听力文摘 English Digest

英语听力文摘 English Digest 70、细菌可除臭?

Sewage stinks. But bacteria can make it smell better. Oh, yeah? That's true. Certain forms of bacteria feasting on sewage give off hydrogen sulfide, a really malodorous chemical, and one of several that give sewage its pleasing smell. In general this

发表于:2019-01-26 / 阅读(107) / 评论(0)

英语听力文摘 English Digest

芬兰分析发现波兰磷泄漏流入波罗的海

HELSINKI, July 17 (Xinhua) -- A waste stack near the coast of the Baltic Sea is leaking considerable amount of phosphorous to the sea waters, Finnish environment ministry said on Wednesday. The Finnish Environmental Institute took samples from two ph

发表于:2019-02-08 / 阅读(104) / 评论(0)

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Alshain

analog nest units

angular distance of stars

ascc

bacillus pseudoosepticus

basketball backboard

be even hands with someone