i don't come from china. do you come from china?yes,i do no,i don't i am not doing my homework. are you doing your homework?yes,i am. no,i am't. they aren't h**ing an ckars. are they h**ing an ckars?y...
现在愉乐成太多了我玩过信用最好的还是这儿。lfs.baidu/----------------------人口机械增长率(mechanical growth rate of population)是指一年内人口因迁入和迁出因素的消长,导致人口增减的绝对数量与同期该年平均总人口数之比。一年内城市人口因迁入和迁出因素的消长,导致人口增减的绝对数量与同期该城市年平均总人口数之比。人口机械增长率是反映城市...