单选题The survival craft is manufactured with fire retardant（）.AfoamBmarine plywoodCsteelDfiberglass
单选题
The survival craft is manufactured with fire retardant（）.
A
foam
B
marine plywood
C
steel
D
fiberglass
参考解析
解析：
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The air cylinder bottles in the survival craft should be refilled with ______.A.oxygenB.nitrogenC.compressed airD.nitrogen and oxygen
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