社会:白人消防员声称遭到“逆向歧视”
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科学60秒:存在钻石星球?
Imagine climbing diamond mountains, or hiking around the graphite shores of a lake of tar. Sound a little sci-fi? Well a new discovery suggests planets like that might be out there—planets with...
科学60秒:"以身犯险"诈骗术
Toss a piece of leaf onto a spiderweb. The spider is indifferent. Because leaves don't squirm like captured flies. But Australia's "assassin bug" _1_ spiders. It exploits their keen sense for vib...
背诵美文——火力发电厂
Coal-fired Power PlantsThe invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel with which to generate large amounts of electr...
政治:英国航空公司机舱服务员罢工计划
政治:英国航空公司机舱服务员罢工计划Strike is off, the judge says plans for a walkout by a British Airway’s Cabin Crew cannot happen. As we reported yesterday, this strike which would have last ...