单选题
Lazy? Shy? Live in a cave? Those might not be positive
attributes for the average human, but they sure are good for animals trying to
survive in a changing environment. According to a new study, beasts that
hibernate(冬眠)or crawl into holes are less likely to be listed as endangered than
those that don't. Following up a previous study on extinct
animals, which showed that species exhibiting "sleep or hide" (SLOH)behaviors
did better than others, the researchers wanted to see if the same was true of
modern crearures like moles and bears. To find out if our more timid animals
have a leg up in the survival game, researchers made a master list of 443
sleep-or-hide mammals. With their list in hand, the team
compared their 443 to the "red list" of endangered species published by the
International Union for Conservation of Nature. As suspected, a sleepy of hiding
animal was less likely to be on the red list than a regular animal, and a
red-list animal was also less likely to be a SLOH-er. This
makes a lot of sense, as animals that hide away in a cave or a tree hole are
protected by their physical shelters from a variable environment outside, while
hibernators enjoy a flexible metabolism(新陈代谢)that can help them adapt to a
changing climate.
单选题
On the list of extinct animals studied, there were ______.
A. fewer SLOH-ers than regular animals
B. more SLOH-ers than expected
C. as many SLOH-ers as regular animals
D. hardly any SLOH-ers
【正确答案】
A
【答案解析】[解析] 属细节题，答案在第三段末尾句。
单选题
The phrase "a leg up" in Paragraph 2 probably means"______".
A. an instinct
B. an advantage
C. a fight
D. a chance
【正确答案】
B
【答案解析】[解析] 根据第二段的第一句话可判断出答案。
单选题
The study of modern creatures ______.
A. is unrelated to the study of extinct animals
B. finds evidence missing in the study of extinct animals
C. has findings similar to those of the study of extinct animals
D. reveals a different pattern from the study of extinct animals
【正确答案】
C
【答案解析】[解析] 答案在第三段。
单选题
According to the passage, red-list animals are more likely to______.
A. be lazy
B. he timid
C. live long
D. sleep less
【正确答案】
D
【答案解析】[解析] 属推断题，答案在第三段。
单选题
In the last paragraph the author ______.
A. compares the behaviors of sleepers and hiders
B. offers an explanation for the survival of sleepers and hiders
C. analyzes how a changing environment affects SLOH-ers