28. The ________ containing liquids such as fuel, water, slops, ballast and various bilges should be noted.
(A)flowing speed
(B)levels of tank
(C)locations
(D)machines

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統計： A(1), B(5), C(0), D(0), E(0) #4054431

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#7519939
答案是 (B) levels of ta...
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