某企业给产品上涂料时，涂料的溶剂是易燃品，原计划采用石棉板做防火材料，经市场调查决定用防火纸代替石棉板能起同样的防火效果，成本降低了40％。根据价值工程原理，这体现了提高价值的途径是()。
A. 功能提高，成本不变
B. 功能不变，成本降低
C. 功能提高，成本降低
D. 功能和成本都降低，但成本降低幅度更大
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Accidental flooding of the engine room bilges by the bilge main is prevented by().
A. stop-check valves installed in the bilge suction manifolds
B. using a positive displacement reciprocating bilge pump
C. installing educators in all bilge rose boxes
D. installing a swing check before each bilge valve
Which of the following firing order may be used for a 6-cylinder engine？ ()
A. 1-2-3-4-5-6
B. 1-2-3-6-5-4
C. 1-5-3-6-2-4
D. 1-3-4-5-6-2
Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result
A. overload on the pump motor
B. low fluid level in the reservoir
C. low fluid viscosity around the shaft seal
D. high oil level in the sump
属于水不溶性多糖的是
A. 芸香糖
B. 葡萄糖
C. 纤维素
D. 淀粉
E. 阿拉伯糖
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