可再生资源的分布是不均衡的,非可再生资源的分布是均衡的。
抛物线y2=2px,过点A(2,4),F为焦点,定点B的坐标为(8,-8),则 AF:BF值为( )
---Does Scott come _________ Beijing?
---Yes, but now he lives _________ his uncle in Shanghai.
读单词找出不同类的一项 ( )