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Part IV Reading Comprehension (Reading in Depth)
Section A
47. very high
题目问飓风等自然灾害带来的损失情况如何。根据题干中的torrential rains, severe thunderstorms和tornadoes 可以定位到文章第一段，最后一句指出损失的总值是exceeded $250 million, 可见损失非常大，故得答案very high.
48. Because the available data are not detailed enough.
题目问传统的天气预报为何不能有效预报短期内天气的变化。由题干中的关键词conventional models of atmosphere 可以定位到第二段的开头，第一句话的后半句because the available weather data are generally not detailed enough直接给出了答案。
49. predicting general weather conditions over large regions
题目问传统的天气预报现在的主要用途。由题干中的关键词conventional models 定位到第二段。最后一句指出conventional forecasting models do a much better job predicting general weather conditions over large regions than..., 即：传统的方式现在主要是用来预测大范围内的总体天气情况。
50. Accurate, short-range forecasts.
题干明确定位了本题的答案(第三段)，第一句话就给出了解释：accurate, very short-range forecasts.
51. Computer programs and video equipment.
题目问什么使得Nowcasting 变成了现实。可以定位到文章的最后一句...using these new technologies in weather forecasting offices, Nowcasting is becoming a reality, 可见是these new technologies 使得Nowcasting成为现实，而these new technologies指代的就是上句话中的computer programs and video equipment.
