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  3. In the second half of each year, many powerful storms are born in the tropical Atlantic and Caribbean seas. Of these, only about

In the second half of each year, many powerful storms are born in the tropical Atlantic and Caribbean seas. Of these, only about

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问题     In the second half of each year, many powerful storms are born in the tropical Atlantic and Caribbean seas. Of these, only about half a dozen generate the strong, circling winds of 75 miles per hour or more that give them hurricane status, and several usually make their way to the coast. There they cause millions of dollars of damage, and bring death to large numbers of people.
    The great storms that hit the coast start as innocent circling disturbances hundreds even thousands of miles out to sea. They travel aimlessly over water warmed by the trade winds. When conditions are just right, warm moist air flows in at the bottom of such a disturbance, moves upward through it and comes out at the top. In the process, the moisture in this warm air produces rain, and with it the heat is converted to energy in the form of strong winds. As the heat increases, the young hurricane begins to swirl in a counterclockwise motion.
    The average life of a hurricane is only about nine days, but it contains almost more power than we can imagine. The energy in the heat released by a hurricane’s rainfall in a single day would satisfy the entire electrical needs of the United States for more than six months. Water, not wind, is the main source of death and destruction in a hurricane. A typical hurricane brings 6 to 12 inch downpours resulting in sudden floods. Worst of all is the powerful movement of the sea-mountains of water moving toward the low-pressure hurricane center. The water level rises as much as 15 feet above normal as it moves toward shore.
What is the worst thing about hurricanes?
选项 A、The destructive effects of water.
B、The heat they release.
C、That they last about nine days on the average.
D、Their strong winds.
答案A
解析 细节题。第三段第三旬说是水而不是风，是造成死亡和损害的主要原因(Water，not wind，is the main source of death and destruction in a hurricane)。
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