陈毅然全套托福阅读详细内容
　　Paragraph 9: The muscles of these fishes and the mechanism that maintains a warm body temperature are also highly efficient. A bluefin tuna in water of 7°C (45°F) can maintain a core temperature of over 25°C (77°F). This warm body temperature may help not only the muscles to work better, but also the brain and the eyes. The billfishes have gone one step further. They have evolved special "heaters" of modified muscle tissue that warm the eyes and brain, maintaining peak performance of these critical organs.


新托福考试专项进阶初级口语 http://toefl.xiaoma.com/shiyongxinxi/20150330/seo=a97.html

.zx_sz { line-height:20px; padding:20px 0; text-align:center; font-weight:bold;}.zx_sz a { padding:10px 10px; color: #FFF; background-color: #00CCFF; font-size:16px; font-weight:bold; text-decoration:none;}.zx_sz a:hover{ color:#ffffff; background-color:#b9cd4a; text-decoration:none;}.zx_dot { font-size:14px;}.zx_dot a { padding-bottom:2px; color:#F60; text-decoration:none;}.zx_dot a:hover { color:#06F; border-bottom:dotted;}.zx_red { color:#F00; font-size:14px; font-weight:bold;}　　10. According to paragraph 9, which of the following is true of bluefin tunas? (3)

　　○Their eyes and brain are more efficient than those of any other fish.

　　○Their body temperature can change greatly depending on the water temperature.

　　○They can swim in waters that are much colder than their own bodies.

　　○They have special muscle tissue that warms their eyes and brain.

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