下面的短文后有2项测试任务： (1)第23-26题要求从所给的6个选项中为第1、2、3、4、5段每段选择1个最佳标题； (2)第27-30题要求从所给的6个选项中为每个句子确定1个最佳选项。 Hurricanes 1 Did
you know that before 1950, hurricanes had no names They were simply given
numbers. The first names were simply Alpha, Bravo, Charlie, etc. but in 1953,
females’ names were given because of the unpredictability (不可预知) factor of the
storms. In 1979, realizing the sexist (性别歧视的) nature of such names, the lists
were expanded to include both men and women. 2 Hurricanes
and typhoons (台风) are the same things. If they form in the Atlantic, we call
these strong storms hurricanes, from the West Indian word hurricane, meaning
"big wind". And if they are Pacific storms, they are called typhoons from the
Chinese taifun, meaning "great wind". To be classified as a hurricane, the storm
must have maximum winds of at least 75 mph. These storms are big, many hundreds
of miles in diameter. 3 Hurricanes get their power from
water vapor as it gives out its stored-up energy. All water vapor gives out heat
as it condenses (凝结) from a gaseous state to a liquid state over fixed points on
the equator (赤道). To make a hurricane, you must have extremely wet, warm air,
the kind of air that can only be found in tropical region. 4
Scientists have determined that the heat given out in the process of water
condensation can be as high as 95 billion kilowatts per hour. In just one day
alone, the storm can produce more energy than many industrialized nations need
in an entire year! The problem is that we don’t know how to make sure such great
energy work for us. 5 Predicting the path of a hurricane
is one of the most difficult tasks for forecasters. It moves at a typical speed
of 15 mph. But not always. Some storms may race at twice this speed, then
suddenly stop and remain in the same location for several days. It can be
maddening (发疯的) if you live in a coastal area that may be hit. 6
The biggest advance in early detection is continuous watch from weather
satellites. With these, we can see the storms form and track them fully, from
birth to death. While they can still kill people and destroy property,
hurricanes will never surprise any nation again. A．A short history of naming
hurricanes B．Harnessing the hurricane energy C．Difficulty in forecasting
the course of a hurricane D．Huge energy stored in a hurricane E.
Forecasting a hurricane through satellite watching F. Different names for the
same things Paragraph 5 ______