科学60秒:地月水不同 彗星释缘由
The Apollo moon missions ended almost 40 years ago. But for lunar scientists, they're ____1____. Researchers studying rocks brought back by astronauts have found that the moon's scarce water has ...
科学60秒:鱼油:吃,还是不吃?
It’s been ____1____ for its healthful, anti-inflammatory properties. It’s been recommended for helping ease the pain of arthritis, preventing cancer and slowing memory loss. But some recent stu
经济:通用汽车公司面临危机
经济:通用汽车公司面临危机Major concerns now about the U.S. auto industry, these numbers are just out, and Toyota finally overtook GM as the world’s biggest automaker in terms of sales for all o...
女子击剑
名词:saber,epee,foilWomen's fencing became an Olympic sport in 1924 and after 80 long years the United States finally has its first medals in the event. Both came in women's saber, which wa...