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BOD5:生物化学需氧量(biochemical oxygen demand)的简写,表示在20摄氏度,5天微生物氧化分解有机物消耗水中溶解氧量,第一阶段为碳化(C-BOD),第二阶段为消化(N-BOD)
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class Super { public int getLenght() { return 4; } } public class Sub extends Super { public long getLenght() { return 5; } public static void main(String[] args) {Super sooper = new Super(); Sub sub = new Sub(); System.out.println( sooper.getLenght() + “,” + sub.getLenght() ); } } What is the output? ()A、 4,4B、 4,5C、 5,4D、 5,5E、 Compilation fails.
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p2Ksubm/sub/pC
p3Ksubm/sub/pD
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判断题BOD5:生物化学需氧量(biochemical oxygen demand)的简写,表示在20摄氏度,5天微生物氧化分解有机物消耗水中溶解氧量,第一阶段为碳化(C-BOD),第二阶段为消化(N-BOD)A
对B
错
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msub0/sub<msube/sub<(xB
msub0/sub=msube/sub=(xC
msub0/sub>msube/sub>(xD
msube/sub<msub0/sub<(x
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单选题BOD是什么生物化学指标()。A
生化需氧量B
化学需氧量C
总有机碳D
总需氧量
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