【C10】A．useB．have usedC．usedD．are used

Fuel oil transfer systems used onboard diesel propelled vessels are required to have _____

A．useB．usedC．usefulD．usefulness

【C10】A．useB．placeC．viewD．absence

______ are those that cannot be used independently but have to be combined with other morp

The phenomenon that two languages are used side by side with each having a different role

Many pure metals have little use because they are