2. 外语
  3. Weather exports use the ______ of the barometer as one of their guides in predicting the weather.

Weather exports use the ______ of the barometer as one of their guides in predicting the weather.

admin2011-04-26  95
问题 Weather exports use the ______ of the barometer as one of their guides in predicting the weather.
选项 A、isobars
B、fluctuations
C、gradations
D、mercury
答案B
解析 (fluctuation波动，起伏)。句意为：气象专家把气压计的上下浮动，作为预报天气的依据之一。A．isobar等压线；C．gradation等级，阶段；D．mercury水银。
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