题干

能正确表示生物与其气体交换部位连线的是
①蚯蚓――体壁   ②蝗虫――气门   ③鱼――鳃   ④家鸽――肺和气囊

A:①③

B:①②

C:②④

D:①④

上一题 下一题 0.0难度 选择题 更新时间:2010-12-13 02:46:33

答案(点此获取答案解析)

D

同类题2

阅读理解

    Plan on traveling around the USA this summer? If you need help in arranging the trip, or want ideas about where to go and what to do, there are a number of outstanding websites that can make your American dream come true.

http://byways.org

The National Scenic Byways Program covers 150 memorable roads. Some are natural routes, such as Route 1 along the California coast. Others focus on history (such as Route 6) or man-made attractions (the Las Vegas Strip). For each, you are provided with a map, told the route's length and how long is allowed, and given detailed suggestions on sights and stop-offs.

www.oyster.com

This is the best website for reviews of hotels in US cities and resorts. The reviews are impressively thorough, covering locations, rooms, cleanliness, food and so on. Importantly, these are not promotional photos by the hotels, but more honest and real ones taken by inspectors. Search facilities are excellent From the 243 hotels reviewed in the New York, you can narrow down what you are looking for by locations, facilities and styles, or just pick out a selection of the best.

www.101 usaholidays.co.uk

This is the latest offering that features 101 holiday ideas to the USA. It's an impressively diverse selection, ranging from touring in the footsteps of Martin Luther King to a golfing break in Arizona and a cycling and wine-tasting trip in California's Napa Valley. Narrow down what you are looking for — whether by price, region, theme and who will be traveling — and then just the photos of the relevant holidays remain on view. It's a really clever design.

www.mousesavers.com

Walt Disney World in California can make dreams come true, but the price is not affordable for the majority of people.

So turn to long established Mouscsavers.com, dedicated to giving big discounts on tickets, hotels and dining at Walt Disney World. The website also offers general money-saving tips, suggestions for cheap and free stuff and brief coverage of other Florida and California theme parks.

同类题3

阅读下面的文字,完成小题。

    政治过度,即政治理想和行为超过了它的内在规定性,或者说政治多做了它所不应当做的事情。二十世纪下半叶以来,主要体现在欧洲和美国出现了政治的过度化,英国宫投脱欧和特朗普在美国受到很大欢迎都是政治严重超过了政治的承载边界的结果。

    为什么会发生政治过度?在于政治会不断迎合"免于匮乏"的需求,当年罗斯福说要"免于匮乏",而匮乏是无止境的。匮乏不仅仅是一种物质现象,也是一种精神现象,在物质基本满足的情况下,人又会对权利提出更多要求,因此“权利”会永远处于被不断开发的状态,永远也不会满足。

    民主政治、福利制度,都是"免于匮乏"的产物,曾经做出过优好的业绩。然而,能使国家兴盛的事物,却也包含了使国家衰败的因子。民主具有两面性,在民主普遍不足的时代,可以凝聚国家实力;但在民主普遍普及的时代,却也容易演变为民粹主义,使民众对国家产生无度需求。由此造成的问题,一种表现是由民主到独裁,即民主对国家提出的要求使政府日益庞大,进而反而有了控制公民的更强能力;另一种是民粹主义高涨,国家要负担起国民的更多福利要求,结果透支国家资源,使国家陷入衰败。

    在特别重大的议题上,举办全民公投、简单多数胜出的方案看起来合理、符合民主精神,然而,政治的内涵并不只是民主,还有有效的国家能力。英国脱欧公投是对二十世纪以来日益高涨的民主精神的呼应,然而,它却是对英国作为民族国家的契约伦理的违背,是在原先做好的政治马车上,又添加了新的货物,导致这辆马车严重过载、不堪重负。

    二十世纪下半叶以来的欧洲和美国,从来没有像这段时间那样,可以近乎绝对地享有和平,这也扭曲了欧洲人和美国人对政治的感觉,由于经常处在危机状态和常有战争威胁,民众容易培养牺牲奉献精神,不会向国家要求过度的福利和权利,但战争威胁的显著减小和战争进入信息化阶段后,以往工业化时代的大规模战争动员机制已没有太大必要,民众为国家付出的意愿也显著弱化,而更多只顾个人利益和权利,于是不断消费国家财富、不断仲张权利,结果国家财政日益亏空,政治制度的边际效应也日益递减,最终随西方国家的去工业化而“向吃光主义迈进”。

    有限的权利保障能力与无限扩张的权利需求之间的对立,是“匮乏”无法化解、政治承载过度、契约伦理扭曲变形的基本成因。二十世纪下半叶以来的各国政府,已在政治家的野心和民众的欲望共同推动下,加大步伐由有限责任政府日益向无限责任政府演变。一个富有无限责任的政府和国家可能存在或长存吗?!

(选自《读书》2017年第2期,有删改)