20. Which of the following ship's type are defined by IBC Code (International Code for the construction and equipment of ships carrying dangerous chemicals in bulk)?
(A) Type 1 and 2 ship.
(B) Type 1, 2 and 3 ship.
(C) Type 1, 2, 3 and 4 ship.
(D) Type A, B and C ship.

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統計： A(80), B(271), C(51), D(126), E(0) #1444673

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-ST1 is a chemical t...
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