①社会契约论

②三权分立学说

③人民主权论

④浪漫主义

力的三要素是力的大小、____和作用点.越靠近门轴推门，越费力，可见是力的____会影响到力的作用效果.

阅读下面文言文，回答问题。

        甲臣本布衣，躬耕于南阳，苟全性命于乱世，不求闻达于诸侯。先帝不以臣卑鄙，猥自枉屈，三顾臣于草庐之中，咨臣以当世之事，由是感激，遂许先帝以驱驰。后值倾覆，受任于败军之际，奉命于危难之间，尔来二十有一年矣。（选自《出师表》）

         乙时先主（刘备）屯新野。徐庶见先主，先主器之，谓先主日：“诸葛孔明者，卧龙也，将军岂愿见之乎?”先主日：“君与俱来。”庶日：“此人可就见，不可屈致也。将军宜枉驾顾之。”由是先主遂诣亮（诸葛亮），凡三往，乃见。因屏人曰：“汉室倾颓，奸臣窃命，主上蒙尘。孤不度德量力，欲信大义于天下，而智术浅短，遂用猖蹶（失败），至于今日。然志犹未已，君谓计将安出?”

                                                                                                                                                                                                                        （选自《隆中对》）

根据下面每段话的陈述内容，选出各段恰当的主题，并将其字母序号填入题前括号内。

（D）

    ____ The world use 1 million plastic（塑料） bags every minute. They can now be found in all parts of the world.

    ____ When I was young, I thought space was wonderful. I spent all day imagining that I h ad my own spaceship. That was my earliest dream.

    ____ In Brazil, people wear white clothes on New Year's Eve, because it brings good luck. At midnight people go to the sea and throw flowers into the sea and make wishes.

    ____ Over hundreds of years the Earth gets hotter and then it gets colder again. The world is getting warmer now.

    ____ Sometimes, good things happen because of mistakes. Once I got on the wrong train. That was a big mistake. But I saw a friend on that train.

A. Climate (气候) change.   

B. The plastic bag problem.

C. New Year in Brazil.      

D. Making mistakes is not always bad.   

E. My childhood dream

①（忽然立起）你是谁？②（抬起头来）你姓什么？③你——你贵姓？④谁指使你来的？⑤（忽然严厉地）你来干什么？