一颗约喷气式飞机大小的小行星,将会在下周与我们近距离擦肩而过。 请看CBC有关报道 http://www.cbc.ca/news/world/story/2013/02/07/technology-asteroid-flyby.html Jet-sized asteroid to pass between Earth and satellites But no risk that it will ...
加美两国研究人员发现,孕妇高暴露与普通农业杀虫剂,会造成婴儿的轻微低出生体重。 Common pesticides linked to lower birth weights Effect comparable to smoking CBC News Posted: Apr 6, 2012 1:05 PM ET Last Updated: Apr 6, 2012 2:57 PM ET ...