温室效应带来健康隐患(1)
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科学60秒:夜间充电益处大
Some things are best done after dark. Setting off fireworks. Telling scary stories. And charging your plug-in hybrid electric vehicle. Because a new study shows that ___1___ your car battery at n...
科学60秒:睡得多,长得快
Parents wring their hands over infant sleep patterns. And so when those patterns change, parents tend to ____1____. But if your baby is sleeping more or napping at weird times, maybe he or she is...
科学60秒:短袖白大褂 抗菌无用处╮(╯▽╰)╭
Good news for chilly doctors—you can wear long sleeves with ___1___ inside hospitals. Because University of Colorado researchers find that docs pick up just as much bacteria when ___2___ as they...
平衡使用肥料(1)
Hints: Sub-Saharan Africa Cornell University in IthacaLaurie DrinkwaterThe researchers say farming methods in Sub-Saharan Africa need to improve or else poor quality soil will increase rural pove...