European football is played in about 80 countries, ____ (make) it the most popular sport in the world.
对比下面两幅图片,从中我们可以推断出的结论是( )
①工业革命使生产能力得到迅速发展
②工业革命后机器生产取代手工劳动
③工业革命使水体污染大量增加
④工业革命后工厂取代手工工场