When is an ordinary tropical storm called a hurricane? [br] [originaltext] I

游客2023-12-29  19

问题 When is an ordinary tropical storm called a hurricane? [br]  
In the second half of each year, many powerful storms are born in the tropical Atlantic and Caribbean seas. Of these, only about a 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. 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, 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 that is converted to energy in the form of strong winds. As the heat increases, the young hurricane begins to swirl in a counter-clockwise motion.
    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 — the 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.

选项 A、Early spring.
B、The second half of each year.
C、Late summer.
D、The middle of the year.

答案 B

解析 时间信息。题干:飓风何时发生?根据文章第一句“In the second half of each year,manypowerful storms are born in the tropical Atlantic and Caribbean seas…,circling winds of 75 miles per hour or more that give them hurricane status”,译文为:每年下半年,许多强大的风暴在热带大西洋和加勒比海地区孕育而成……风速为每小时75英里或超过
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