题干

如下表示人体内气体交换的过程,其中能发生气体交换的是(  )

空气呼吸道肺泡血液组织细胞.

A:①和②

B:②和④

C:①和③

D:③和④

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答案(点此获取答案解析)

D

同类题1

民主政治是人类共同的文明成果。阅读材料,回答问题。

研究角度一:古代民主政治的发展

如果公民大会通过了某项议案,那么这一议案就成为所有公民必须遵循和执行的法律。……其中的一些重要法律要委托大会秘书刻碑存证。碑文的开头必然是“议事会和人民决议”,或仅仅是“人民决议”,……雅典民主政权机关的运作机制和操作程序,以及不同构成单位之间的整合关系正是依赖这些法律才得以存在和运行的。

——廖学盛《世界历史十五讲》

研究角度二:各具特色的民主政体

资产阶级的这种发展的每个阶段,都伴随着相应的政治上的进展。它在封建主统治下是被压迫的等级……从大工业和世界市场建立的时候起,它在现代的代议制国家里夺得了独占的政治统治。——《共产党宣言》

研究角度三:法制化与民主进程

材料一  《联邦宪法》(指1787年宪法)的制定者们在热切希望建立强有力的中央政府的同时,一刻也没有放松对于一切形式的专制政治的警惕。

——马克垚《世界文明史》

材料二  美国黑人领袖马丁·路德·金在谈到1787年宪法时说:“一个向上帝要求赋予自由的民族,没有迈出同时给予非洲人自由的第一步是不应该的。”

研究角度四:“旧邦改造”与“人民当家作主”

近百年来,中国社会各阶层进行着“旧邦改造”的实践。中华人民共和国成立后,开创了以国家根本大法的形式确立了人民当家作主的政治局面。

同类题3

阅读理解

    Since 1989, Dave Thomas, who died at the age of 69, was one of the most recognizable faces on TV. He appeared in more than 800 commercials for the hamburger chain named for his daughter. “As long as it works”, he said in 1991, “I'll continue to do those commercials.”

    Even though he was successful, Thomas remained troubled by his childhood. “He still won't let anyone see his feet, which are out of shape because he never had proper fitting shoes,” Wendy said in 1993. Born to a single mother, he was adopted as a baby by Rex and Auleva Thomas of Kalamazoo in Michigan. After Auleva died when he was 5, Thomas spent years on the road as Rex traveled around seeking construction work. “He fed me,” Thomas said, “and if I got out of line, he'd beat me.”

    Moving out on his own at 15, Thomas worked, first as a waiter, in many restaurants. But he had something much better in mind. “I thought if I owned a restaurant,” he said, “I could eat for free.” A 1956 meeting with Harland Sanders led Thomas to a career as the manager of a Kentucky Chicken restaurant that made him a millionaire in 1968.

    In 1969, after breaking with Sanders, Thomas started the first Wendy's Old Fashioned Hamburgers, in Columbus, Ohio, which set itself apart by serving made-to-order burgers. With 6,000 restaurants worldwide, the chain now makes $ 6 billion a year in sales. Although troubled by his own experience with adoption, Thomas, married since 1954 to Lorraine, 66, and with four grown kids besides Wendy, felt it could offer a future for other children. He started the Dave Thomas Foundation for Adoption in 1992.

    In 1993, Thomas, who had left school at 15, graduated from Coconut Creek High School in Florida. He even took Lorraine to the graduation dance party. The kids voted him Most Likely to Succeed.

    “The Dave you saw on TV was the real Dave,” says friend Pat Williams. “He wasn't a great actor or a great speaker .He was just Joe Everybody.”