[化] sp,2杂化轨道; sp,2杂化轨道函数; 正三角形杂化轨函数

60秒科学:Can Hybrid Cars Be Too Quiet?

Hybrid cars are good for the environment. But scientists say that they might be bad for pedestrians. Because hybrids are so quiet, it can be hard for walkers to hear them until its too late. Listen to this. [quiet car sound] Thats a Toyota Prius mov

发表于:2019-01-02 / 阅读(102) / 评论(0)

60秒科学

VOA慢速英语2010年-EXPLORATIONS - Are EVs, Plug-in Hybrid

SHIRLEY GRIFFITH: Im Shirley Griffith. STEVE EMBER: And Im Steve Ember with EXPLORATIONS in VOA Special English. Starting this Friday, the auto industry will show off more than nine hundred of its latest vehicles at the LA Auto Show in Los Angeles, C

发表于:2019-01-12 / 阅读(82) / 评论(0)

2010年VOA慢速英语(十一)月

2007年VOA标准英语-Sudan Won't Allow Darfur Peacekeepers to Use Al

By Nick Wadhams Nairobi 23 July 2007 Sudan's government is warning that it will not accept a joint United Nations and African Union force that has the mandate to use all means necessary - including force - to keep the peace in Darfur. As Nick Wadhams

发表于:2019-01-12 / 阅读(70) / 评论(0)

2007年VOA标准英语（七月）

2007年VOA标准英语-Sudan Balks at Threat of US Sanctions

By Noel King Khartoum 29 May 2007 Sudan says President Bush is unjustified in his decision to impose new sanctions on Khartoum because of the situation in Darfur. Before the sanctions were even announced at the White House on Monday, Sudanese officia

发表于:2019-01-13 / 阅读(74) / 评论(0)

2007年VOA标准英语（五月）

2007年VOA标准英语-Town in Central African Republic Occupied by Re

By Naomi Schwarz Dakar 25 May 2007 A rebel leader in the Central African Republic says about1,000 rebels from a rival group have occupied a town near the border with Sudan. The men are reported to be part of a splinter organization within the Union o

发表于:2019-01-13 / 阅读(55) / 评论(0)

2007年VOA标准英语（五月）

AGRICULTURE REPORT - Hybrids

AGRICULTURE REPORT - Hybrids By Broadcast: Tuesday, June 08, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Since ancient times, farmers have chosen the seeds for the coming

发表于:2019-01-30 / 阅读(67) / 评论(0)

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6-aminopurine

acculturative

actuarial experience gains and losses