The most important information to be obtained from a barometer is the ().

A.difference between the reading of the two pointers,which shows wind direction

B.last two figures of the reading of the pointer,such as 87,76,or 92

C.present reading of the pressure,combined with the changes in pressure observed in the recent past

D.weather indications printed on the dial(such as cold,wet,eetc.)under the poin

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  • 悬赏:0 答案豆
  • 提问人:zjd950131
  • 发布时间:2019-04-30
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