1. class Test { 2. private Demo d; 3. void start() { 4. d = new Demo(); 5. this.takeDemo(d); 6. } 7. 8. void takeDemo(Demo demo) { 9. demo = null; 10. demo = new Demo(); 11. } 12. } When is the Demo object, created on line 3, eligible for garbage collection?() [" After line 5."," After line 9."," After the start() method completes."," When the takeDemo() method completes."," When the instance running this code is made eligible for garbage collection."]
多缸机若有一个气缸火花塞不能产生符合规定的火花时,发动机功率() ["升高","降低","正常","停车"]
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