2015年9月13日托福阅读

　　2015年9月13日的托福考试大家都准备的怎么样了，出国留学网托福考试栏目为了让广大考生更好地规划复习、应对即将到来的考试，特地整理了以下2015年9月13日托福阅读真题预测，提前祝大家考试成功!

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　　2015年9月13日托福阅读真题预测：

　　PASSAGE 1

　　Aviculturists, people who raise birds for commercial sale, have not yet learned how tosimulate the natural incubation of parrot eggs in the wild. They continue to look for betterways to increase egg production and to improve chick survival rates.

　　When parrots incubate their eggs in the wild, the temperature and humidity of the nestare controlled naturally. Heat is transferred from the bird's skin to the top portion of theeggshell, leaving the sides and bottom of the egg at a cooler temperature. This temperaturegradient may be vital to successful hatching. Nest construction can contribute to this temperature gradient. Nests of loosely arranged sticks, rocks, or dirt are cooler in temperatureat the bottom where the egg contacts the nesting material. Such nests also act as humidityregulators by allowing rain to drain into the bottom sections of the nest so that the eggs arenot in direct contact with the water. As the water that collects in the bottom of the nest evaporates, the water va...