问题
单项选择题
A vessel emitting harmful substances into the air or spilling oil into the sea is a（）.
A.polluter
B.emitter
C.spiller
D.oiler
答案
参考答案：A
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A vessel emitting harmful substances into the air or spilling oil into the sea is a（）.
A.polluter
B.emitter
C.spiller
D.oiler
参考答案：A