“民以食为天”,我国是世界上最早种植水稻的国家。你知道我国哪个地方的先民最早吃到香喷喷的米饭[ ]
A.浙江河姆渡
B.陕西半坡
C.北京周口店
D.云南元谋县
答案:A
________ deep down in the earth for thousands of years, the dead forest has rotted away and become coal.
A.Having buried
B.Being buried
C.Buried
D.To be buried
疝块在站立时出现,平卧后消失()
A.难复性疝
B.易复性疝
C.嵌顿性疝
D.绞窄性疝
E.滑动性疝