搜寻百度词条，我们发现，其给“社会思潮”下的定义是：“在特定的社会历史背景下，建立在一定的社会心理基础上，具备某种相应的理论形态并在一定范围内具有相当影响力的带有某种倾向性的思想趋势。”纵观人类社会发展，出现了多次社会思潮，它对社会及个人产生了乃至变革性的影响。据此回答：
（1）18世纪末，一场暴风骤雨般的革命浪潮席卷法国，该革命的发生与启蒙思想有着密切联系，请举一例启蒙思想家的代表人物。
（2）中国一位名叫胡嗣穈的人读《天演论》，看到“物竞天择，优胜劣汰”的话，听从二哥的建议改名为“胡适“，“物竞天择，优胜劣汰”是谁最先提出来的？其有何划时代意义？
（3）社会思潮具有时代性，20世纪30年代末至40年代中期，“救亡”成为中国社会思潮的主流，在渝文化界有何突出表现？
（4）二战结束以后，反思二战成为新的社会思潮，请你分析毕加索《格尔尼卡》在这方面的艺术成就。就此请你谈谈文化与所处时代的关系。

许多历史人物为国家作出了突出贡献，他们的崇高品质值得我们继承与发扬。下列与其他各项有明显区别的是（  ）

从地面竖直上抛物体A，同时在某一高度处有一物体B自由下落，两物体在空中相遇时的速率都是v，则（   ）

A Smart Dog

    Rico is a dog who lives in Germany,____ When his owner says the name of a certain toy, Rico can find it. In fact, he seems to know the names of 200 toys!

    ____. They put his toys in a room and then told him to go in the room and find a certain toy. Since nobody was in the room with Rico, he had no help from anyone finding the right toy. The researchers did this test forty times. Rico found the right toy thirty-seven times!

    Then the researcher tried something else. They put seven of Rico's toys in the room and one new toy that Rico had never seen before.____ . This new toy had a name Rico had never heard before. Rico found the right toy seven out of ten times!

    Researchers cannot really say that Rico know words or languages.____They believed Rico can think about what he hears and thin about what he knows. In fact, Rico seems to thin and remember things as well as three-year-old child.

    From these tests, animal researchers know one thing for sure. Rico has given them a lot to think about.

A. Then they told Rico to go into the room and get the new toy.

B. However, these tests seem to show Rico is smart.

C. Some researchers in Germany wanted to test Rico.

D. His owner has trained him to find his toys.