填空题.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 9 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 10 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

填空题The Overworked, Networked Family A

填空题The Truth of Automobile and Cell Phone A

填空题.Why Do the Brits Drive on the Left? A. Let's be honest, this question is only phrased this way to appease the two-thirds of the drivers of the world that now drive on the right-hand side of the road. The real question, the question that deserves to be asked, is this: why did everyone else stop driving on the left? B. Taking the left hand side in traffic is a habit that goes back hundreds of years, possibly as far as the ancient Greeks, Egyptians and Romans, but certainly to an era when people

填空题They Trash Cars, Don't They? A

填空题Small Schools Rising This year's list of the top

填空题Fight Unhealthy Food, Not Fat People A

填空题. The Gulf Between College Students and Librarians A. Students rarely ask librarians for help, even when they need it. This is one of the sobering (令人警醒的) truths the librarians have learned over the course of a two-year, five-campus ethnographic (人种学的) study examining how students view and use their campus libraries. The idea of a librarian as an academic expert who is available to talk about assignments and hold their hands through the research process is, in fact, foreign to most students. Th

填空题Accustomed though we are to speaking of the films

填空题As is known to a11

填空题A. It's easy to be complacent (自满的

填空题Unlike the other four senses

填空题.It seems individual cancer cells send out the same distress signals as wounds, tricking immune cells into helping them grow into turnouts. The finding suggests that anti-inflammatory drugs could help to combat or prevent cancer. "Lifelong, if you take a small quantity of something that 1 inflammation (炎症), such as aspirin, it could reduce the risk of cancer," says Adam Hurlstone of the University of Manchester, UK. When tissue is wounded or infected it produces hydrogen peroxide. White blo

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填空题When writers attempt to anticipate the future

填空题Many people believe the glare from snow causes sno