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  3. (1)The direct rays of the sun touch the equator and strike northward toward the Tropic of Cancer. In the Southern hemisphere win

(1)The direct rays of the sun touch the equator and strike northward toward the Tropic of Cancer. In the Southern hemisphere win

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问题     (1)The direct rays of the sun touch the equator and strike northward toward the Tropic of Cancer. In the Southern hemisphere winter has begun, and it is summer north of the equator. The sea and air grow warmer; the polar air of winter begins its gradual retreat.
    (2)The northward shift of the sun also brings the season of tropical cyclones to the northern hemisphere, a season that is ending for the Pacific and India Oceans south of the equator. Along our coasts and those of Asia, it is time to look seaward, to guard against the season’s storms. Over the Pacific, the tropical cyclone season is never quite over, but varies in intensity. Every year, conditions east of the Philippines send a score of violent storms howling toward Asia, but it is worst from June through October. Southwest of Mexico, a few Pacific hurricanes will grow during spring and summer, but most will die at sea or perish over the desert or the lower California coast as squalls.
    (3)Along our Atlantic and Gulf coasts, the hurricane season is from June to November. In an average year, there are fewer than ten tropical cyclones and six of them will develop into hurricanes. These will kill 50 to 100 persons between Texas and Maine and cause property damage of more man $100 million. If the year is worse than average, we will suffer several hundred deaths, and property damage will run to billions of dollars.
    (4)Tornadoes, floods, and severe storms are in season elsewhere on the continent. Now, to these destructive forces must be added the hazard of the hurricane. From the National Hurricane Center in Miami, a radar fence reaches westward to Texas and northward to New England. It provides a 200-mile look into offshore disturbances. In Maryland, the giant computers of the National Meteorological Center digest the myriad bits of data—atmospheric pressure, temperature, humidity, surface winds, and winds aloft—received from weather stations and ships monitoring the atmospheric setting each hour, every day. Cloud photographs from spacecraft orbiting the earth are received in Maryland and are studied for the telltale spiral on the warming sea. The crew of United States aircraft over the Gulf of Mexico, Caribbean, and Atlantic watch the sky and wait for the storm that will bear a person’s name. The machinery of early warning vibrates with new urgency as the season of great storms begins.
The passage discusses most clearly about ______.
选项 A、the factors that cause hurricanes
B、the most risky areas that suffer hurricanes
C、the early warning system against hurricanes
D、the remedies for property damage by hurricanes
答案C
解析 本文第1、2段主要描述了北半球的飓风季，第3段描述了飓风季对生命财产的损害，第4段描述了各地区对飓风的预警体统，在四个选项中，C总结了第4段的主要内容，符合本题题意。其他选项中，A(飓风形成的原因)、B中的most risky areas和D中的remedies(补救方法)都没有原文依据。
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