122.When a vessel violates an oil pollution act，who may be held responsible?( )。

The clever use of colors ____________________ to the success of the oil painting. A: is unnecessary B: was unnecessary C: was of great importance D: is of great importance

Protecting the earth is a worldwide question because ______ A: pollution is everywhere in the world B: polluted air and water in one place affects distant areas C: people all over the world are responsible for the pollution problem D: all of the above

Which one is wrong? A: Solid wastes are produced in production, living and other activities B: All solid wastes lost their original use values C: A stream of waste water can be included into the management of solid wastes upon the strength of administrative regulations D: Dewatered sludge is a solid waste

Much of the pollution could be controlled if only（） A: people would pay more attention to the problem B: governments would take effective measures C: all sides concerned would make more efforts D: farmers would use less artificial fertilizers