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序号 题目内容
200 With respect to most species of animals, they are evenly diivided in right-or left-handedness, unlike humans.
201 Using digital enhancements of skull fragments from five prehistoric hominids dating to more than 350,000 years ago, anthropologists argue that these human ancestors probably had hearing similar to that of people today.
202 The interior minister explained that one of the village planning proposal`s best characteristics was their not detracting from the project`s overall benefit by being a burden on the development budget.
203 Like ants, termites have an elaborate social structure in which a few individuals reproduce and the rest are serving the colony by tending juveniles, gathering food, building the nest, or they battle intruders.
204 Global warming is said to be responsible for extreme weather changes, which, like the heavy rains that caused more than $2 billion in damages and led to flooding throughout the state of California,and the heat wave in the Northeastern and Midwestern United States, which was also the cause of a great amount of damage and destruction.
205 Hundreds of species of fish generate and discharge electric currents, in bursts or as steady electric fields around their bodies, using their power either to find and attack prey, to defend themselves, or also for communicating and navigating.
206 Native to South America, when peanuts were introduced to Africa by Portuguese explorers early in the sixteenth century they were quickly adopted into Africa`s agriculture, probably because of being so similar to the Bambarra groundnut, a popular indigenous plant.
207 It stood twelve feet tall, weighed nine thousand pounds, and wielded seven-inch claws, and Megatherium americanum, a giant ground sloth,may have been the largest hunting mammal ever to walk the Earth.
208 Studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this that an epidemic of malaria struck in the empire`s waning days.
209 Butterflies come in more than 17,000 species,displaying a wing pattern unique to each one.
210 A March 2000 Census Bureau survey showed that Mexico accounted for more than a quarter of all foreign-born residents of the United States, the largest share for any country to contribute since 1890, when about 30 percent of the country's foreign-born population was from Germany.
211 Recently declassified information from military satellites in orbit thousands of miles above the Earth show the planet continually bombarded by large meteoroids that explode with the power of atomic bomb blasts.
212 Child development specialists believe that, in confining babies much of the time to strollers, high chairs, playpens, and walkers, muscle development can be inhibited.
213 Together with Key Largo National Marine Sanctuary, the John Pennekamp Coral Reef State Park,provide 165 squre nautical miles of marine life for underwater explorers, which includes more than 500 species of fish and 55 varieties of coral.
214 While Hollywood makes films primarily for entertainment, the motion picture was not first developed to entertain, but it was to allow detailed analysis of animal motion.
215 The personal income tax did not become permanent in the United States until the First World War; before that time the federal government was dependent on tariffs to be their main source of revenue.
216 In 1776 Adam Smith wrote that it is young people who have "the contempt of risk and the presumptuous hope of success" needed to found new businesses.
217 Palladium prices have soared, with Russia restricting exports and because automakers have started using it to make the huge engines in sport utility vehicles and other light trucks.
218 Variability in individual physical traits both are determined through genetic factors, environmental factors, and interaction between these factors.
219 In his Uses of Enchantment (1976), it was psychologist Bruno Bettelheim`s assertion that the apparently cruel and arbitrary nature of many fairy tales actually are an instructive reflection of a child`s natural and necessary "killing off" of successive phases in his or her own development.

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