单项选择题

A.DEFEB.DEC.DSD.DESDiesel powered industrial trucks on ……

Diesel powered industrial trucks on a ship that are provided with safeguards to the exhaust，fuel，and electrical systems are designated（）.

A.DEFE
B.DE
C.DS
D.DES

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A.Cygnus
B.Pegasus
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A.longitudinally
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C.transversely
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