2014年我国某省上半年城乡收入对比表：

上述图表说明（   ）
①我国城乡居民收入有较大增幅                ②我国城乡社会发展仍存在不平衡
③我国城乡居民收入差距在逐步扩大        ④我国仍然处于社会主义初级阶段

有两个鸡蛋，一生一熟，让它们在光滑的水平桌面上以同样的速度同时开始转动：

     Do you write your own blog(博客)？Do you often1others' blogs on the Internet?
All over the world, not only famous persons but also many students use blogs as diaries and places to share their experience and2advice or help.
   “I write my activities every day3funny things or worries in my life.” says Lali, a 16-year-old high school student at Cambridge High School in Washington." I like putting pictures on my blog because it can make my blog more4and more people will like it, It's a good way to5my life to the world." She has had her blog for eight months.
      Students like writing blogs6they can write anything they want to, but don't need to7any money.
      Once(一旦)you start to write your blog, you will8that you open up a new world. But what you write down may trouble you9. So, use the blog carefully10you can keep yourself away from some trouble. The blog makes everybody's life colorful.

    I can't help but feel ____(concern) about the ____(destroy) of tropical forests. It is one of the most serious environment problems today. From ____ I know, people are damaging thousands of square ____(kilometer) of forests every day. This is killing hundreds of wild animals that live in the forests.

    ____(fortunate), we do nothing but talk about it. We don't do anything ____(protect) the forests. We need to stop people doing it. There should be ____(strong) laws. I think that people who cut ____ forests should go to prison. That's what should happen to people who destroy the forests and kill wildlife.

    In my opinion, we, human beings, must protect wildlife ____ future generations. Hopefully, our children ____(be) more responsible than we are today.

将2.0mol SO₂气体和2.0mol SO₃气体混合于固定体积的密闭容器中，在一定条件下发生反应：2SO₂（g）+O₂（g）⇌2SO₃（g），达到平衡时SO₃为n mol．在相同温度下，分别按下列配比在相同密闭容器中放入起始物质，平衡时SO₃等于n mol的是（　　）