文学活动有什么要素?关系如何?
什么是语音的弱化和脱落?指出下列语流中的弱化和脱落现象:
汉语:脑袋[nQu][tail>[nau ta] 打扮[tA][pan]>[tA p3n] 衣服[fu]>[if] 你们[ni][man]>[him]
英语:of C0v]>[or](…的…)
俄语:xopomo[XOrO。Jo]>[XOrA。Jo](好)

Scientists have long assumed that most of the ice that melted was in the Northern hemisphere(半球) during the 30,000-year long ice age.