单项选择题
On offshore drilling units，emergency lighting and each emergency power system must be tested at least once a（）.
A.day
B.week
C.month
D.year
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It is the responsibility of the Master or person in charge of a ship to ensure that（）.
A.the Muster List ("Station Bill") is posted in each compartment
B.temporary personnel and visitors are advised of emergency stations
C.names of crew members are listed on the Muster List ("Station Bill")
D.no changes are made to the Muster List ("Station Bill") -
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In each inflatable liferaft，what equipment is provided to make quick，emergency，temporary repairs to large holes in the raft? （）
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B.rapson slide
C.follow-up gear
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