电影配乐(1)

科学60秒:柳叶刀：医学预言仍未实现

January often gets people thinking about what they’ve accomplished over the past 12 months. This year, it got the editors of the medical journal The Lancet to _____1_____ how far health care has

Baa,baa,black sheep.

Baa,baa,black sheepBaa,baa,black sheep. Have you any wool? Yes sir ,yes sir. Three bags full. One for the master. One for the dame. One for the little boy. Who lives down the lane.黑绵羊咩咩叫 ...

科学60秒:热带雨林坍塌，爬行动物激增

The November 26th issue of the journal Science included a study showing that the extinction of the dinosaurs some 65 million years ago allowed ____1____ mammals to get really big. But well before