Advection fog may be formed by cold ai

1、Advection fog is most commonly caused

Advection fog is most commonly caused by（）.Aair being warmed above the dew pointBsaturation of cold air by rainCa rapid cooling of the air near the surface of the Earth at nightDwarm moist air being blown over a colder surface

2、Fog forms when the air（）.

Fog forms when the air（）.AIs 50% water saturatedBIs 90% water saturatedCTemperature is greater than the dew point temperatureDTemperature is equal to，or below the dew point temperature

3、Liens may be created by the contract（）

Liens may be created by the contract（）they do not exist at common law.AwhereBwhetherCthereDand

4、Chronometer error may be found by（）.

Chronometer error may be found by（）.Aradio time signalBcomparison with a timepiece of known errorCapplying the prevailing chronometer rate to previous readingsDAll of the above

5、Advection fog holds longest over which

Advection fog holds longest over which portions of the lakes? （）ANorthwestBSoutheastCNortheastDSouthwest

6、Traffic separation schemes may be（）by

Traffic separation schemes may be（）by the Organization for the purpose of these Rules.AadoptedBadaptedCadjustedDadmitted