3.答:A最佳【分析】此题设计的意图是检测考生对所提供信息进行简单判断的能力。文章开头第一段已指出事故发生在昨天下午5:27，文章结尾的最后一段则指出Waldorf-Astoria Hotel大厅里巨大的电子钟在今晨5:25又开始滴答作响了。因此，停电时间也就是接近十二小时。

　　E

　　Fish Ears Tell fish Tales

　　Fish have ears. Really. They're quite small and have no opening to the outside world carrying sound through the body. For the past seven years, Simon Thorrold, a university professor, has been examining fish ears, small round ear bones called otoliths.

　　As fish grow, so do their otoliths. Each day, their otoliths gain a ring of calcium carbonate (碳酸钙). By looking through a microscope (显微镜) and counting these rings, Thorrold can determine the exact age of a young fish. As a fish gets older, its otoliths on longer get daily rings. Instead, they get yearly rings, which can also be counted, giving information about the fish's age, just like the growth rings of a tree.

　　Ring counting is nothing new to fish scientists. But Thorrold has turned to a new direction. They're examining the chemical elements (元素) of each otolith ring.

　　The daily ring gives us the time, but chemistry tells us about the environment in which the fish swam on any given day. These elements tell us about the chemistry of the water that the fish was in. It also says something about water temperature, which determines how much of these elements will gather within each otolith ring.

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