如何理解“台独”分裂势力以任何名义、任何方式造成台湾从中国分裂出去的事实，国家得采取

                                                                          凹面镜

           反射面是球面的一部分的镜子叫球面镜。用球面的内表面做反射面的叫做凹面镜，简称凹镜。 

          我们都知道，用平行光对着平面镜照射，则反射光线也是平行的，也就是说，平面镜对光线既不起会聚作用又不起发射作用。那么，凹镜对光线会有什么作用呢？小明同学首先进行了大胆的猜想，先找到了所有可能的情况，即会聚、发散、不会聚也不发散，只有这三种情况。但究竟哪种情况是正确的呢？小明进行了如下实验： 

         他将10只激光手电筒捆绑在一起，形成一束平行光。然后正对这凹镜照射，发现了如图所示的现象。

请同学们通过对上述文章的阅读，回答下列问题：

（1）通过实验，小明得出了什么结论？

（2）你认为凹镜可以有哪些应用？请说出2个。

（3）实验室中所用的显微镜载物台下面的小镜子是一块凹面镜，请你用刚学过的知识解释一下这样做有什么优点？

     I'm usually fairly skeptical about any research that concludes that people are either happier or

unhappier or more or less certain of themselves than they were 50 years ago. While any of these

statements might be true, they are practically impossible to prove scientifically. Still, I was struck by

a report which concluded that today's children are significantly more anxious than children in the

1950s. In fact, the analysis showed, normal children aged 9 to 17 exhibit a higher level of anxiety today

than children who were treated for mental illness 50 years ago.

     Why are America's kids so stressed? The report cites two main causes: increasing physical isolation

(隔离) brought on by high divorce rates and less involvement in community, among other things and a

growing perception that the world is a more dangerous place.

     Considering that we_can't_turn_the_clock_back,_adults can still do plenty to help the next

generation.

     At the top of the list is nurturing(培育) a better appreciation of the limits of individualism. No child is

an island.  Strengthening social ties helps build communities and protect individuals against stress.

     To help kids build stronger connections with others, you can pull the plug on TVs and computers. 

Your family will thank you later. They will have more time for facetoface relationships, and they will get

more sleep.

     Limit the amount of virtual(虚拟的) violence your children are exposed to. It's not just video games

and movies; children see a lot of murder and crime on the local news.

Keep your expectations for your children reasonable. Many highly successful people never attended

Harvard or Yale.

     Make exercise part of your daily routine. It will help you cope with your own anxieties and provide

a good model for your kids. Sometimes anxiety is unavoidable. But it doesn't have to ruin your life.

1. According to the analysis, compared with normal children today, children treated as mentally ill 50 years ago ________.

A. probably suffered less from anxiety

B. were considered less individualistic

C. were less isolated physically

D. were probably less selfcentered

2. What does the author mean by saying "we can't turn the clock back" in the third paragraph?

A. It's impossible to forget the past.  

B. The social reality children are facing cannot be forgotten.

C. It's impossible to slow down the pace of change.

D. Lessons learned from the past should not be forgotten.

3. The author thinks that the conclusions of any research about people's state of mind are ________.

A. illogical  

B. confusing

C. surprising  

D. questionable

《雨打芭蕉》是（）的传统曲目。

A.广东音乐

B.江南丝竹

C.福建南曲

D.潮州音乐

农业技术进步的3条道路主要是指（）

A、中国道路，美国道路，俄罗斯道路；

B、美国道路，俄罗斯道路，英国道路；

C、美国道路，欧洲道路，日本道路；

D、印度道路，法国道路，美国道路

疫毒痢的病变部位在：（）

A.脾胃

B.肠胃

C.脾肾

D.肝肾

E.肝胃