Language is arbitrary in that there is

1、There is a growing realization that th

There is a growing realization that the only effective way to achieve further reductions in vehicle（）is to replace conventional diesel fuel and gasoline with cleaner-burning fuels.ApermissionBemissionComissionDMissio

2、A(n)（）indicates that there is serious

A(n)（）indicates that there is serious danger for vessel, crew and passenger.Adistress alertBurgency messageCsafety messageDroutine message

3、There is a possibility that small vess

There is a possibility that small vessel，ice and other floating objects may not be（）by radar at an adequate range.AreflectBshownCdetectedDdefected

4、Why is first language forbidden in a D

Why is first language forbidden in a Direct Method classroom?

5、It is（）that we could only stay there f

It is（）that we could only stay there for three weeks.AsadnessBsadlyCsadDsaddened

6、An（）indicates that there is imminent r

An（）indicates that there is imminent risk for navigation.Adistress alertBurgency messageCsafety messageDroutine message