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About 150 million years ago, in Montana,...

    About 150 million years ago, in Montana, a young dinosaur roamed through a land. Not yet five years old, the long-necked creature somehow ended up buried in a violent and muddy flood, forever freezing it in adolescence.

Now, researchers have found this potentially record-setting dinosaur. After uncovering the remains, the scientists argue that the skull (烦骨) is the smallest yet found from a group of long-necked dinosaurs called Diplodocus (梁龙). The little fellow even has a nickname Andrew, after Andrew Carnegie, who funded the research, and there is a Diplodocus species named after him.

With its skull just 10 inches across , researchers’ best guess is that Andrew was a juvenile Diplodocus—an especially rare find. While more than a hundred Diplodocus samples have been discovered, their skulls are much rarer. Fewer than a dozen have been dug up to date. If the researchers’ reconstruction is correct, Andrew’s skull could be the smallest and least mature Diplodocus skull ever found, potentially providing insights into the dinosaur’s development.

Kristi Curry Rogers, a paleontologist at Macalester College in Minnesota doesn’t fully agree with the findings because of the poor preservation of the fossil (化石). Andrew’s skull is missing parts of the cheek, palate and lower jaw, plus the fossils are slightly pressed. These problems make it hard to reconstruct the skull, let alone infer the dinosaur’s behavior from it.

“The researchers don’t address the damage of the skull or the missing components of the face in any great detail, which could easily change the explanations,” she said in an email.

For now, Diplodocus is the best guess for Andrew’s identity, but it could also be an unknown species. To help settle the debate, Andrew’s skull is currently being 3-D scanned for future research.

1.What did the researchers discover?

A. The youngest Diplodocus. B. The biggest dinosaur skull.

C. A rare dinosaur fossil. D. A species of Diplodocuses.

2.The underlined word “juvenile” in paragraph 3 is closest in meaning to “_________”.

A. young B. strong

C. ancient D. dead

3.Why does Rogers disagree with the researchers’ guess?

A. The researchers have lost some parts of the fossil.

B. The guess of the fossil lacks enough evidence.

C. She couldn’t understand the researchers’ explanations.

D. She has his own opinions about the dinosaur’s development.

 

1.C 2.A 3.B 【解析】 这是一篇说明文。介绍了研究人员发现了跨世纪恐龙。介绍了恐龙化石的大小,结构和如何研究。 1.细节理解题。根据第三段第一句With its skull just 10 inches across , researchers’ best guess is that Andrew was a juvenile Diplodocus—an especially rare find.可知研究人员发现了一只幼年梁龙的化石,这是很稀有的恐龙化石。故选C。 2.词义猜测题。根据第三段最后一句If the researchers’ reconstruction is correct, Andrew’s skull could be the smallest and least mature Diplodocus skull ever found可知安德鲁的头骨可能是迄今为止发现的最小、最不成熟的梁龙头骨即可知划线部分单词juvenile意思为“年轻的”故选A。 3.细节理解题。根据第四段Andrew’s skull is missing parts of the cheek, palate and lower jaw, plus the fossils are slightly pressed. These problems make it hard to reconstruct the skull, let alone infer the dinosaur’s behavior from it.可知Rogers认为安德鲁的头骨缺失了部分脸颊、上颚和下颚,而且化石被轻微挤压。这些问题使得重建头骨变得困难,更不用说从头骨推断恐龙的行为了。因此她不同意研究人员的猜测是因为关于化石的猜测缺少足够的证据,故选B。
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