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题目内容
（佳木斯大学语言治疗学）
Meteorologists forecast the weather _____.
· whethey have received satellite pictures
· after they have compared new satellite pictures with earlier ones
· before they received satellite pictures
· during they study satellite pictures
· whethey have received satellite pictures
· after they have compared new satellite pictures with earlier ones
· before they received satellite pictures
· during they study satellite pictures
参考答案
