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Researchers
in Australia have confirmed the discovery of Australia's largest dinosaur
species ever found. Australotitan
cooperensis was about 80 to 100 feet long and 16 to 21 feet tall at its
bottom. It weighed somewhere between 25 and 81 tons.
The
first of the creature' bones were dug out back in 2006 and 2007, but only now,
after years of analysis, have researchers been able to confirm that the bones
are from the largest dinosaur in Australia. "It's taken this long because
it's such a complex piece of work. You have to take the bones out of the ground
and prepare the fossils arid then you study them and compare them against all
other species of dinosaurs worldwide," says Scott Hocknull, a
paleontologist (古生物学者) at the Queensland
Museum.
Diego
Pol, head of paleontology in Argentina, says these large dinosaurs were
probably living in vast spaces across a connected land including what is now
South America, Antarctica and Australia. "This means that if we go to
Antarctica and dig into the right rocks, most likely we will find supergiant
dinosaurs too. So I found that super exciting."
As
part of its research, the Australian team used new 3D-scanning technology to
scan the bones from Australotitan and compare them with those of similar
species. Both Australian and Argentine researchers agree that the new
technology has opened doors for sharing information. Previously,
paleontologists might have needed to fly across the world to look at fossils in
person, Pol says the super-high resolution (分辨率)
that now exists is "like having the real bone in your computer."
"Discoveries
like this are just the tip of the iceberg," Hocknull said in the statement
"Our ultimate goal is to find more evidence that tells the changing story
of Queensland, hundreds of millions of years in the making. A grand story all
scientists, museums and tourists will be interested in."
(1)
Why has it taken long to confirm the bones?
A . There are lots of bone fossils to study.
B . It's difficult to finish the whole process.
C . It's difficult to take the bones out of the ground.
D . There are many species of dinosaurs to discover.
(2)
What makes Diego Pol extremely excited?
A . Right rocks found in Antarctic.
B . Large dinosaurs living in vast spaces.
C . Continents once connected with each other.
D . Possibility of finding supergiant dinosaurs in Antarctic.
(3)
What's researchers' attitude to new 3D-scanning technology?
A . Positive.
B . Neutral (中立的)
C . Cautious.
D . Negative.
(4)
What can be inferred from the last paragraph?
A . Queensland is changing too quickly.
B . Tourists will participate in discoveries.
C . More discoveries will possibly be made.
D . The whole story of Queensland is revealed.
答案: B
D
A
C