单项选择题

The author implies that birds ______.

A．move faster and have greater endurance than reptiles
B．move slower and have less endurance than reptiles
C．move faster and have greater endurance than dinosaurs
D．move slower and have less endurance than dinosaurs
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单项选择题
What does the author imply by the sentence: Ironically, the particular dinosaur in which the discovery was made was a Tescelosaurus, which translates to marvelous lizard.
A．It is paradoxical that the dinosaur's name includes the word lizard, because now scientists believe it is not a lizard.
B．It is unusual that the creature would have a name with the suffix of a dinosaur.
C．It is surprising that the fossilized heart was discovered.
D．It should have been realized long ago that dinosaurs were warm-blooded.
单项选择题
What is the basis of the researchers' new theory
A．They performed mathematical calculations and determined that dinosaurs must have had four chambered hearts.
B．They found a fossil of an entire dinosaur end reviewed the arteries and veins flowing from and to the heart.
C．They found a fossil of a dinosaur's heart and discovered it had four chambers and one aorta.
D．They viewed a fossil of a dinosaur's heart and discovered that it had two aortas.
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