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Jurassic Park could become a reality with dinosaurs making a comeback after a discovery last week. Scientists found remains of a dinosaur’s blood vessels(血管)and cells .In theory, DNA from these cells could be used to clone the longdead dinosaur.

A team from North Carolina State University found the remains in a fossil(化石)of the leg bone of a Tyrannosaurus rex(暴龙)in Montana, US.

The last dinosaurs on Earth died some 65 million years ago, but they left bits of themselves behind wherever they lived. Around the world ,dug-up bones and fossils have given scientists many ideas about what the animals were like.

Preserved by minerals, the newly discovered leg bone was hard. So the scientists used a liquid to dissolve(溶解)the minerals. A week later, the remaining material was soft and stretchy(有弹性的),which surprised the researchers.

Some of the materials appeared to be a network of blood vessels. Out of these, the researchers were able to squeeze(挤出)tiny , round, dark-red and deep-brown structures that seemed to be ancient blood cells.

Scientists are overjoyed by this discovery because most fossils come from hard body parts, like bones and shells, which last a long time. Soft tissues, like skin, muscle, and organs are very hard to find because they tend to break down more quickly.

Scientists think that the new discovery will help them to better understand how fossils form. Future finds should also help flesh out how the dinosaurs lived.

They were also very excited by the possibility of having some dinosaur DNA.From that scientists could create a real life “Jurassic Park”.

In the Hollywood movie, scientists reproduced dinosaurs from the DNA they found in a mosquito fossil and disaster soon followed.

Scientists are excited _________________________ .

A. because they have got dinosaur DNA

B. about making a movie called “Jurassic Park”

C. because they found the liquid to dissolve fossils

D. because it,s very hard to find soft tissues in fossils

The latest discovery can tell us       .

A. what the animals were like         B. how fossils form

C. how the dinosaur lived            D. how to get dinosaur DNA

What does the underlined phrase“flesh out”mean in the article?

A. add more details or information to     B. take more photos of

C. make the public know more about     D. find the answer to

Why is the latest discovery very important?

A. It could make it possible to make dinosaurs return to the former position.

B. It could throw light on how dinosaurs lived many years ago.

C. It could prove what dinosaurs were like.

D. It could explain why dinosaurs died some 65 million years ago.

【小题1】D

【小题2】B

【小题3】A

【小题4】A


解析:

【小题1】 细节题。根据短文第六段可知,科学家一般发现的化石都是动物躯体较硬的部位,而这次在恐龙化石中找到了软组织,克隆恐龙成为可能。 这种发现十分罕见,所以科学家感到很兴奋。

【小题2】细节题。根据第七段“the new discovery will help them to better understand how fossils form”一句可知:最新发现有助于了解化石是怎样形成的。

【小题3】词义猜测题。根据上文内容和本句中的“also help”推测可得:将来的发现对有关恐龙的生活情况会增添更多的信息和细节。

【小题4】 推断题。综合全文信息,科学家在暴龙化石中找到了软组织,在软组织中有可能找到恐龙的DNA, 再从DNA中克隆恐龙,因此复活恐龙也许成为可能。

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