Millipedes may be characterized as ( ). A: active predators B: venomous C: scavengers and detritivores D: monoecious E: viviparous

“The huge, unpredictable apes” (Para. 7) refer to ______. A: cats’ predators B: cat owners C: visiting guests of the house

Unit3-Thishelpedtoconvincemany ——of thecaseforrestoringthe building to its former condition.Times, Sunday Times(2009) A: sceptics B: predators C: doubts D: sceptic

29. According to the professor, why were the<br/>jellyfish that the student saw glowing? A: They were communicating with each other. B: They were trying to confuse predators with<br/>bright flashes of light. C: They were avoiding predators by blending in<br/>with their surrounding. D: They were trying to light up the dark water<br/>so they could see prey.

In the jungle, there is usually little time to （） A: recognize where a threat has come from B: compare the benefits of different actions C: weigh merits and demerits of game theory D: escape attacks from powerful predators

The difference between food webs and food chains is that food webs: A: Consist of only one trophic level B: Include primary producers as well as consumers C: Do not take into account predators D: Are more complex

The most effective way to prevent extinctions for the long term would be A: protecting the endangered species habitat B: capture breeding programs C: paying poachers to refrain from poaching D: removing the predators of endangered species E: instigating feeding programs for endangered species

3. What is the finding of the study? A: Female elephants born in the zoo die much earlier than those in the wild. B: Wild female Asian elephants live longer than their African counterparts. C: Most wild elephants were killed by predators instead of dying of natural causes. D: Baby elephants raised in the zoo are less likely to suffer from natural diseases.

完型填空:(从所给的15个词里选择恰当的词填空)Just because they can't sing opera or ride a bicycle doesn't mean that animals don't have culture. There's no better example of this than killer whales. As one of the most __1__ predators （食肉动物）, killer whales may not fit the __2__ of a cultured creature. However, these beasts of the sea do display a vast range of highly __3__ behaviors that appear to be driving their genetic development.The word "culture" comes from the Latin "colere," which __4__ means "to cultivate." In other words, it refers to anything that is __5__ or learnt, rather than instinctive or natural. Among human populations, culture not only affects the way we live, but also writes itself into our genes, affecting who we are. For instance, having spent many generations hunting the fat marine mammals of the Arctic, the Eskimos of Greenland have developed certain genetic __6__ that help them digest and utilize this fat- rich diet, thereby allowing them to __7__ in their cold climate.Like humans, killer whales have colonized a range of different __8__ across the globe, occupying every ocean basin on the planet with an empire that ____ 9t hunting techniques in order to gain the upper hand over their local prey （猎物）. This, in turn, has a major effect on their diet, leading scientists to __10__ that the ability to learn population-specific hunting methods could be driving the animals, genetic developmentA) acquiredB) adaptationsC) brutalD) deliberatelyE) expressedF) extendsG) habitatsH) humbleI) imageJ) literallyK) refinedL) revolvesM) speculateN) structureO) thrive

答案请填写对应的大写字母。Just because they can't sing opera or ride a bicycle doesn't mean that animals don't have culture. There's no better example of this than killer whales. As one of the most __26__ predators （食肉动物）, killer whales may not fit the __27__ of a cultured creature. However, these beasts of the sea do display a vast range of highly __28__ behaviors that appear to be driving their genetic development.The word "culture" comes from the Latin "colere," which __29__ means "to cultivate." In other words, it refers to anything that is __30__ or learnt, rather than instinctive or natural. Among human populations, culture not only affects the way we live, but also writes itself into our genes, affecting who we are. For instance, having spent many generations hunting the fat marine mammals of the Arctic, the Eskimos of Greenland have developed certain genetic __31__ that help them digest and utilize this fat- rich diet, thereby allowing them to __32__ in their cold climate.Like humans, killer whales have colonized a range of different __33__ across the globe, occupying every ocean basin on the planet with an empire that __34__ from pole to pole. As such, different populations of killer whales have had to learn different hunting techniques in order to gain the upper hand over their local prey （猎物）. This, in turn, has a major effect on their diet, leading scientists to __35__ that the ability to learn population-specific hunting methods could be driving the animals, genetic development.A) acquired B) adaptations C) brutal D) deliberately E) expressed F) extends G) habitats H) humble I) image J) literally K) refined L) revolves M) speculate N) structure O) thrive