读文回答问题。

①季康子问政于孔子曰：“如杀无道，以就有道，何如？”孔子对曰：“子为政，焉用杀？子欲善而民善矣。君子之德风，小人之德草，草上之风，必偃。”

②齐景公问政于孔子。孔子对曰：“君君，臣臣，父父，子子。”公曰：“善哉！信如君不君，臣不臣，父不父，子不子，虽有粟，吾得而食诸？”

面对同样的问题，孔子为什么分别作了不同的回答？请说说你的理解。

今浙江省的乌镇，是典型的江南水乡古镇，有着“鱼米之乡，丝绸之府”之美誉，在东晋、南朝时期，该镇及其周围地区的农作物种植情况是（    ）

要除去FeSO₄中含有的CuSO₄杂质。可以在其溶液中加入____，充分反应后，再用____方法除去杂质；该反应的化学方程式是：____。

    Nowadays more and more people are using modern traffic and modern communication means. The world ____ (it) is becoming much smaller. So life today is much easier than it was ____ (hundred) of years ago. but it has brought new ____ (problem). One of the biggest problems is pollution. To pollute mean to make things dirty. Pollution comes ____ many ways. We see it, smell it, drink it and even hear it.

    Air pollution is still the most serious. It's bad to all living things in the world, but it is not the ____ (bad) one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us become angry more ____ (easy).

    Pollution by SO₂ is really the most dangerous problem of air pollution. It is ____ (cause) by heavy traffic. It is true that ____ there are fewer people driving, there will be less air pollution.

    The earth is ____ (we) home. We must take care of it. That means ____ (keep) the land water and air clean. And we must take care of the rise in pollution at the same time.