巴西机场发生坠机事故(1)
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科学60秒:和藻类共生的蝾螈
A rolling stone gathers no____1____. But a salamander embryo can attract algae. Inside its tissues and cells. This intimate________—the first ever seen between algae and a vertebrate—is reveale...
生命的拼搏
短文Life Struggle Once upon a time in a land far far away, there was a wonderful old man who loved everything. Animals, spiders, insects... One day while walking through the woods the nice ol...
防止食物变质的妙方 (1)
Nigeria Mohammed Bah Abba A few degrees can make a big difference when it comes to food storage. Foods can go bad if they get too warm. But for many of the world's poor, finding a good way to ke...
甩开包袱,大干一场(1)
GM,美国通用汽车公司,最近和全美汽车工人协会达成了一项协议Labor relations in the American auto industry took a new turn this week with a deal that many are calling historic. General Motors and th...