阅读下列材料，回答问题。

材料一  1933年，整个资本主义世界工业生产下降40%，各国工业产量倒退到19世纪末的水平，资本主义世界贸易总额减少2/3，美、德、法、英共有29万家企业破产。资本主义世界失业工人有3 000多万。

材料二  经济风暴的另一影响是使地方性的经济民族主义发展到妨害国际关系的程度。在总崩溃的大潮流中，各国的自卫措施都采取了诸如较高的关税、更严格的进口限额、结算协定、货币管制条例和双边贸易协定之类的形式。这些措施必然会引起各国间的经济摩擦和政治上的紧张关系。

                       ——美斯塔夫里阿诺斯《全球通史》

材料三  1929～1933年爆发的世界资本主义经济大危机更加助长了本已严重的贸易保护主义浪潮，各国间的关税大战愈演愈烈。美国将关税水平提高至53%，推动了45个国家不同程度地提高了关税。国际贸易进一步趋于萎缩，而这反过来又加深了危机本身。深刻的教训促使各国开始认识到在生产国际化日益发展的背景下，广泛开展国际协调与合作的必要性。

               ——杨起善《关贸总协定与复关对策研究》

计算：（ $\sqrt{3}$ ﹣2）⁰+（ $\frac{1}{3}$ ）^﹣1+4cos30°﹣| $\sqrt{3}$ ﹣ $\sqrt{27}$ |

阅读材料，回答问题

材料一：黑格尔认为，整个世界是“绝对观念”的“外化”和产物。

材料二：我国北宋哲学家张载提出了以“气”为核心的宇宙结构说。他认为世界是由两部分构成的，一部分是看得见的万物，一部分是看不见的，而两部分都是由“气”组成的。

There are lots of rules at Selina's school.
She agrees with some1them. For example, they can't arrive2 , they can't  run in the hallways, and they can't eat in class. All3 rules are okay because they're reasonable(合情合理的).
But there are some rules Selina4agree with. For example, at her school they have to wear a uniform and they can't wear jeans. But she thinks jeans are5because they're comfortable. In school, they can't listen to music in art class. Selina doesn't agree with this rule. She thinks 6 music in art crass is okay.
Selina7 has to follow some rules at home. For example,8she wants towatch TV, she has to finish her homework first. And she can't go out with her friends 9school nights, that is, from Monday to Friday, she also has to clean her room10week. Luckily, she doesn't have to take out the trash（垃圾）. She hates it.

将一根带电的金属棒靠近验电器小球时，验电器箔片由于带上正电荷而张开，则下列结论正确的是（  ）