单选题Scientific research has revealed that throughout the animal world, communication is just as important as it is to human beings. Countless animals lack the (67) for human speech, yet they employ entirely different methods in order to communicate (68) each other. Some of the most dramatic examples of this are provided by birds. There arc roughly 10000 (69) of birds in the world, each of which has its own miraculous features. (70) you may live, you can see a great number of these feathered creatures and can (71) different and extraordinary properties. In addition to their flawless flight mechanisms, expertise (72) the routes and timing of migrations, and ability to build nests, their methods to communicate is (73) wonder. At critical times in birds' lives, their (74) of hearing becomes particularly important. Experiments have shown that in order for birds to learn the (75) song of their own species, they need an auditory feedback system. (76) this system, young birds learn to (77) the sounds they produce with the song they have memorized. If they were (78) , it wouldn't normally be (79) for them to recognize songs. Birds' extremely sensitive hearing functions perfectly. Clearly, if this sense failed to (80) properly, the bird would not be able to hear any sounds (81) . Moreover, birds also produce (82) communications by their facial expressions, beak movements, feather ruffling, and (83) their wings. Although each species has its own body language, many different species (84) movements in the same way. Via facial expression, birds can (85) a variety of messages to those around them—negative feelings such as dislike and resentment, as well as (86) ones like pleasure, enthusiasm and curiosity.

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单选题According to the passage, which one is NOT TRUE?

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单选题By the time, Eliot had already risen to _______ in the literary circle in his country.

单选题The writer would be less critical if fashion designers placed mere stress on the ______ of clothing.

单选题White males______ 40 per cent of high-tech workforce and hold 70 per cent of the science and engineering jobs.

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单选题 Passage Two Questions 19 to 22 are based on the passage you have just heard.

单选题{{B}}Passage Two{{/B}} The Goulburn Valley was one of Australia's prosperous dairying regions. But over the last five years, it's estimated that half the dairy farms have gone. Typically, the water has been sold off and the property converted to a hobby farm, or allowed to turn to weed-infested scrub(野草遍布的灌木). This scene of rural ruin is now spreading across Australia's food bowl. Whole irrigation regions are on the edge of collapse. This disaster is threatening the nation's food security. Politicians blame the drought. But it's much more than that. Mismanagement and gross policy neglect of irrigation have helped create the water shortages. Further, the federal and state governments, instead of investing in new water storages to increase the supply of water, and instead of turning over environmental flows to needy irrigation farms, are buying up irrigation water, not from willing sellers, but from desperate farmers trying to survive. Consequently, investment in rural industries is being cut short. Lenders are rightly judging that they cannot determine if any irrigation farmer or his district will be possible in the future, because nobody can assess how much water will be sold out of that region. Once a critical amount of water leaves a region, irrigation channels are no longer possible. That means others who still want to farm are also no longer possible. This sets up a domino(多米诺骨牌) effect—local farm-supply businesses, processors, shops, schools and hospitals are no longer sustainable. Suddenly, a whole regional economy collapses. Currently, the Government has put a ban on the Commonwealth Government buying irrigation water and Victoria has prohibited Commonwealth purchase from farmers on main backbone channels. In fact, the total federal government take of water could be at minimum 14 percent of the Basin's irrigation water, or as high as 29 percent of farmers' water. According to the Australian Farm Institute, Australian agriculture is worth about 12.2 percent of the nation's economy, or about $130 billion. Hence. taking 14～29 per cent of water out of production will reduce Australia's agriculture by $7～15 billion. Furthermore, Australians don't realize that most of agricultural product is sold into the domestic market. Hence, the Commonwealth Government's water buy-back scheme is set to push Australia to the brink of becoming a net importer of food.

单选题The word "officials' ( Line 2, Para. 4) most probably refers to ___________.