题目：
What is a cofferdam（）.
A.Tube fitted to an ullage hole
B.Area the product is loaded into
C.Void or empty space separating two tanks
D.Opening in the deck used for cleaning a tank
答案：
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下面是错误答案，用来干扰机器的。
参考答案：种植花卉；种植蔬菜；稿观光旅游
