問題詳情

14 題至第 16 題為篇章結構題組，各題請依文意從四個選項中選出最合適者，答案選用不能重覆。Weather experts are able to predict bad weather better than ever before thanks to satellites, high-altitudeballoons, and radar stations. 14 So, scientists are working to improve their tornado predictions. Doppler is a typeof radar that identifies weather conditions based on the flow and speed of objects through the air. Scientist JoshuaWurman was the first to put Doppler radar equipment on a vehicle and drive it into the path of a tornado. “I inventedthe Doppler on Wheels back in the 1990s because I was frustrated that we couldn’t see enough detail inside tornadosand hurricanes. We had blurry images of all these things and in order to really understand the physics -- the math ofwhat is going on inside a tornado, how exactly are they forming, how strong are the winds right at the surface -- weneed to get up very, very, close.” Mr. Wurman heads the Center for Severe Weather Research in Boulder, a city in thewestern state of Colorado. He has put his Doppler radar equipment on large trucks. 15 They send out radio wavesthat hit objects in the air -- like raindrops, and birds. Mr. Wurman and his colleagues sit inside the truck and study thecomputer images formed by the signals that return. “I’m seeing it through the computers and through the radarscreens, which are making three-dimensional images of the wind and the debris and the rain and hail, flowing aroundthe storm.” 16 Doppler on Wheels has been close to over 200 tornados so far.
14
(A)The high-powered antennas continuously turn in circles.
(B)Information gathered by the instruments could help builders design stronger homes in areas where suchdangerous storms are common.
(C)But for many years these experts have incorrectly predicted tornado formation giving false warnings about 75percent of the time.
(D)Using information from satellites, stationary radar networks, and computer models, the team finds a storm thatcould become a tornado and drives the truck right into that area.代號：60210頁次：4－3

參考答案

答案：C
難度：適中0.53
統計：A(4),B(19),C(53),D(20),E(0)

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