朝鮮核武會談有望重開(1)

科學60秒:小小科學家揭開制茶丑聞

After water, tea is the world’s most popular drink. Now three New York City high school students have discovered what may be a ___1___. Because they found stuff in lots of teas that shouldn’t

科學60秒:醫(yī)生昏昏欲睡 手術患者擔責

Over the years ____1____ limit the hours of hospital interns and residents. Because someone putting in a 100-hour workweek might not be at their best when deciding which medication to prescribe o...

科學60秒:年老易摔倒怎么辦？

The elderly suffer from ___1___. A third of people over 65 fall at least once a year. Half of those fall more frequently. Exercise can help, especially when they exercise to this . That’s right,...