單項(xiàng)選擇題You will extinguish a fire when you remove().

A.nitrogen
B.oxygen
C.sodium
D.carbon dioxide


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1.單項(xiàng)選擇題You’d better()your course to port to avoid collision.

A.to alter
B.alter
C.altering
D.altered

2.單項(xiàng)選擇題Your fireman’s outfit includes a(n)().

A.chemical protection face shield
B.approved work vest
C.self-contained breathing apparatus
D.marlinspike

5.單項(xiàng)選擇題Your vessel has lifeboats on both sides. Lifeboat No.2 is located().

A.forward of lifeboat No.4 on the starboard side
B.forward of lifeboat No.4. on the port side
C.aft of lifeboat No. 1 on the starboard side
D.All of the above