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of the extent of groundwater resources

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Unformatted text preview: w.liuwenyong.com 在在在在在在在在在在在在在在在,在在在在在在在在在在 10. The phrase courses through in the passage is closest in meaning to ○rises through ○heats up in ○runs through ○collects in 11. According to paragraph 6, which of the following statements is most accurate about young leatherback turtles? ○They lack the countercurrent exchange systems that develop in adulthood. ○Their rate of growth is slower than that of other sea turtles. ○They lose heat easily even with insulation and countercurrent exchange systems. ○They switch between cold­blooded and warm­blooded modes throughout their hatchling stage. Paragraph 3: Leatherbacks keep their body heat in three different ways. The first, and simplest, is size. The bigger the animal is, the lower as surface to­volum e ratio; for every ounce of body mass, there is proportionately less surface through which heat can escape. An adult leatherback is twice the size of the biggest cheloniid sea turtles and will therefore take longer to cool off. Maintaining a high body temperature through sheer bulk is called gigantotherrny. █ It works for elephants, for whales, and, perhaps, it worked for many of the larger dinosaurs. █ It apparently works, in a smaller way, for some other sea turtles. █ Large loggerhead and green turtles can maintain their body temperature at a degree or two above that of the surrounding water, and gigantothermy is probably the way they do a. █ Muscular activity helps, too, and an actively swimming green turtle may be T C (12.6° F) warmer than the waters it swims through. 12. Look at the four squares [█] that indicate where the following sentence could be added to the passage . However, these animals have additional means of staying warm. Where would the sentence best fit? 13. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Contrary to what we would expect of reptiles. the leatherback turtle is actually warm­blooded. ● ● ● Answer Choices ○Even though they swim into cold ocean waters, leatherbacks maintain their body heat in much the same way as sea turtles in warm southern oceans do. ○The leatherback turtle uses a countercurrent exchange system in order to keep the flippers from drawing heat away from the rest of the body. ○The shape of the leatherback turtle's flippers is especially important in maintaining heat in extremely cold northern waters. ○The leatherback turtle is able to maintain body heat through sheer size. ○Leatherbacks have an insulating layer that can be considered the reptilian version of blubber. ○Young leatherbacks often do not survive to adulthood because they are not...
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