Contour elevations on this chart refer

1、Lines on a chart which connect points

Lines on a chart which connect points of equal magnetic variation are called （）.Amagnetic latitudesBmagnetic declinationsCdipDisogonic line

2、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

3、On chart，bearings to near objects shou

On chart，bearings to near objects should be used in preference to objects farther off，because（）.Aa small error in bearing or in laying it d...

4、Refer to the exhibit. Based on this c

Refer to the exhibit. Based on this command output, what can we conclude about R3?（）A R3 is an ABR.B R3 is not connec ted to the backbone.C R3 has four neighbors.D R3 is the DR for area 2.

5、Isobars on a synoptic chart are useful

Isobars on a synoptic chart are useful in predicting（）.AtemperatureBdew pointCwind velocityDrelative humidity

6、Positions read from this chart should

Positions read from this chart should be moved 0.08 minutes Southward and 0.13 minutes Eastward so as （） adjoining chart 344.Ato agree uponBin accordance withCto be same asDto agree with