A line on a weather chart connecting places which have the same barometric pressure is called an（）.
- Aisotherm
- Bisallobar
- Cisobar
- Disotope
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1、Isogonic lines are lines on a chart in
Isogonic lines are lines on a chart indicating （）.Apoints of equal variationBpoints of zero variationCthe magnetic latitudeDmagnetic di
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2、Lines on a chart which connect points
Lines on a chart which connect points of equal magnetic variation are called （）.Amagnetic latitudesBmagnetic declinationsCdipDisogonic line
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3、On a hydrocarbon flammability chart th
On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.Aminimum oxygen content lineBcritical displacement lineCcritical dilution lineDupper threshold limit
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4、On a gnomonic chart，a great circle tra
On a gnomonic chart，a great circle track between Los Angeles and Brisbane will appear as a （）.Aloxodromic curveBcurved line concave to the equatorCstraight lineDspiral approaching the poles as a limit
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5、Isobars on a synoptic chart are useful
Isobars on a synoptic chart are useful in predicting（）.AtemperatureBdew pointCwind velocityDrelative humidity
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6、Widely spaced isobars on a weather map
Widely spaced isobars on a weather map indicate（）.AHigh windsBGentle breezesCIce，snow or frozen rainDProbability of tornado