问题
单项选择题
The preferred type of pollution control for oil spills on the water is(are) （）.
A.straw
B.booms
C.skimmers
D.chemical dispersants
答案
参考答案：B
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The preferred type of pollution control for oil spills on the water is(are) （）.
A.straw
B.booms
C.skimmers
D.chemical dispersants
参考答案：B