一般铁合金铸件落砂时,铸件的温度可以在()℃以下。
A. 50
B. 100
C. 300
D. 400
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1. public class X ( 2. public object m () { 3. object o = new float (3.14F); 4. object [] oa = new object [1]; 5. oa[0]= o; 6. o = null; 7. return oa[0]; 8. } 9. } When is the float object created in line 3, eligible for garbage collection?()
A. Just after line 5
B. Just after line 6
C. Just after line 7 (that is, as the method returns)
D. Never in this method.
填料起()作用。
A. 固定
B. 密封
C. 润滑
D. 冷却