2021GMAT真题模拟04-10

1、Based on the information given in the passage, which of the following would be most effective in preventing a person infected with malaria from developing a hemorrhagic fever?（单选题）

A. Surgical removal of the spleen

B. A medicine that prevents changes to the surface proteins of red blood cells

C. An effective vaccine against malaria

D. A potent pesticide that reliably kills the Anopheles mosquito without producing any negative consequences for the environment or for human health

E. A small infusion of a weaker variant of the Plasmodium protozoan that will then compete with the existing parasitic infection

试题答案：B

2、Some paleontologists claim that the discovery of what appear to be feathers in the fossil of an Archosaur could force a revision of current theories on the phylogeny of Archosaurs, alter conceptions of dinosaur skin surfaces, and require scholars to credit birds with a far earlier orion than previously thought.（单选题）

A. require scholars to credit birds with a far earlier origin than previously thought

B. scholars may be required to credit birds with a far earlier origin than previously thought

C. require a crediting by scholars of birds with a far earlier origin than previously thought

D. compared to what was previously thought,  require scholars to credit birds with a far earlier origin

E. crediting birds with a far earlier origin than scholars had previously though

试题答案：A

3、The mention of the discovery of 110 previously unknown epigrams by the poet Posidippus serves what purpose in the passage?（单选题）

A. Revealing insights into the nuances of court culture in Hellenistic Egypt

B. Demonstrating how durable a material papyrus can be

C. Arguing for a greater appreciation of this little-known Hellenistic poet

D. Highlighting the importance of royal patronage in the development or arts and literature in the Hellenistic world

E. Illustrating the kind of discovery that can be made from researching papyrus fragments

试题答案：E

4、Paleontologists hypothesize that modern birds evolved from the family of dinosaurs that included Tyrannosaurus rex. This hypothesis would be strongly supported if evidence that dinosaurs from this family had a body covering resembling feathers could be found, but so far no such evidence has been found.
　 Which of the following, if true, would most help the paleontologists explain why no evidence of feathered dinosaurs has yet been found?（单选题）

A. Fossilized dinosaurs have shown many birdlike characteristics, such as bone structure and winglike arms.

B. If birds are in fact the descendants of dinosaurs, then it can be argued that the dinosaurs never really died out.

C. Flying dinosaurs such as the Pteranodon, which is not thought to have been related to modern birds, do not appear to have had feathers.

D. Soft tissues such as skin and feathers do not fossilize like bones, and therefore are far less likely to have left permanent evidence in the fossil record.

E. The thousands of dinosaur fossils excavated by paleontologists represent only a tiny fraction of the billions of dinosaurs that once lived.

试题答案：D

5、The percent change in the weight from age 2 months to age 10 months is approximately ______ the percent change in the weight from age 10 months to age 19 months.（单选题）

A. equal to

B. 2 times

C. 3 times

试题答案：B