This passage describes __________.

[材料题] (1)In the second half of each year, many powerful storms are born in the warmer southern Atlantic and Caribbean seas. Of these, only about a half a dozen create the strong, circling winds of 75 miles per hour or more that can cause great harm, 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. (2)The great storms that hit the coast start as innocent circling winds hundreds―even thousands―of miles out to sea. As they travel aimlessly over water warmed by the summer sun, they are carried westward by the trade winds. When conditions are just right, warm, wet air flows in at the bottom of these winds, moves upward through it, and comes out at the top. In the process, the water in this warm air produces rain. And the heat is changed to energy in the form of strong winds. As the heat increases, the young storm begins to move in circles, turning in the direction opposite to the movement of a clock's hands. (3)The average li

单项选择题1.This passage describes __________.: A、the growth of great storms; B、the damage caused by great storms; C、the average life of a great storm; D、All of the above

单项选择题2.According to the passage, the growth of a great storm goes through the following steps:: A、small winds―trade winds―air flows―wet air―rain―heat―strong wind; B、wet air―trade winds―strong wind―rain―warm winds―heat―air flows; C、small winds―wet air―trade wind―strong wind―air flows―heat―rain; D、wet air―trade wind―strong wind―heat―air flows―small winds―rain

单项选择题3.The greatest cause of death and damage in a great storm is ______________.: A、water; B、wind; C、heat; D、air flows

单项选择题4.According to the passage, the energy in the heat given by a great storm's rainfall in a single day would _______________________________.: A、destroy half of the farmlands in the United States within one hour; B、provide electrical power to the U. S. for more than half a year; C、supply water to the United States for more than six months; D、flood the Unites States for six months

单项选择题5.The powerful storms described in this passage have winds that move at __________.: A、75 miles per hour or more; B、less than 75 miles per hour; C、half a dozen miles per hour; D、75 miles per hour

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