题目内容
【题目】“血迹石”是约三亿年前，海水中一些具有钙质硬壳骨骼的海生生物的遗体，在沉积期间，与海水中的氧化铁和氧化锰成分发生作用后形成的一种奇特岩石。“千人石”为距今一亿五千万年的中生代侏罗纪时代喷发的岩浆凝结而成。据此回答下列问题。
【1】与“血迹石”和“千人石”成因类型相同的分别是 （ ）
A．花岗岩和石灰岩 B．大理岩和砂岩
C．石灰岩和玄武岩 D．砂岩和片麻岩
【2】关于“血迹石”和“千人石”的形成，叙述正确的是 （ ）
A．“血迹石”的形成是外力作用的结果
B．“血迹石”的形成经历了风化、侵蚀、搬运、沉积、固结成岩和地壳运动等过程
C．“千人石”一定具有层理构造
D．“千人石”的形成经历了变质作用和冷凝作用
【答案】
【1】C
【2】A
【解析】
试题分析：
【1】由材料可知“血迹石”是海水中一些具有钙质硬壳骨骼的海生生物的遗体，经沉积作用形成的，属于沉积岩中的石灰岩；“千人石”是喷发出的岩浆凝结而成，是岩浆岩中的玄武岩；而花岗岩是侵入岩，大理岩、片麻岩是变质岩，故选项C正确。
【2】结合上题分析可知，“千人石”是岩浆岩，没有经历变质作用，层理构造是沉积岩的突出特点，故排除选项 C、D；由于 “血迹石”是海洋生物遗体在沉积期间发生反应形成的，属于外力作用的结果，但没有经历了风化、侵蚀、搬运等过程，故选项A正确。
【题目】Passage4（2016·新课标卷III ，D）
体裁 | 话题 | 词数 | 难度 | 建议时间 |
说明文 | 好消息在网络上的传播速度比坏消息要快 | 346 | ★★★☆☆ | 6分钟 |
Bad news sells. If it bleeds, it leads. No news is good news, and good news is no news. Those are the classic rules for the evening broadcasts and the morning papers. But now that information is being spread and monitored(监控) in different ways, researchers are discovering new rules. By tracking people’s e-mails and online posts, scientists have found that good news can spread faster and farther than disasters and sob stories.
＂The ‘if it bleeds’ rule works for mass media,＂ says Jonah Berger, a scholar at the University of Pennsylvania. ＂They want your eyeballs and don’t care how you’re feeling. But when you share a story with your friends, you care a lot more how they react. You don’t want them to think of you as a Debbie Downer.＂
Researchers analyzing word-of-mouth communication — e-mails, Web posts and reviews, face-to-face conversations — found that it tended to be more positive than negative(消极的), but that didn’t necessarily mean people preferred positive news. Was positive news shared more often simply because people experienced more good things than bad things? To test for that possibility, Dr. Berger looked at how people spread a particular set of news stories: thousands of articles on The New York Times’ website. He and a Penn colleague analyzed the ＂most e-mailed＂ list for six months. One of his first findings was that articles in the science section were much more likely to make the list than non-science articles. He found that science amazed Times’ readers and made them want to share this positive feeling with others.
Readers also tended to share articles that were exciting or funny, or that inspired negative feelings like anger or anxiety, but not articles that left them merely sad. They needed to be aroused(激发) one way or the other, and they preferred good news to bad. The more positive an article, the more likely it was to be shared, as Dr. Berger explains in his new book, ＂Contagious: Why Things Catch On.＂
【1】What do the classic rules mentioned in the text apply to?
A. News reports.
B. Research papers.
C. Private e-mails.
D. Daily conversations.
【2】What can we infer about people like Debbie Downer?
A. They’re socially inactive.
B. They’re good at telling stories.
C. They’re inconsiderate of others.
D. They’re careful with their words.
【3】Which tended to be the most e-mailed according to Dr. Berger’s research?
A. Sports news.
B. Science articles.
C. Personal accounts.
D.
【4】What can be a suitable title for the text?
A. Sad Stories Travel Far and Wide.
B. Online News Attracts More People.
C. Reading Habits Change with the Times.
D. Good News Beats Bad on Social Networks.