题目内容

DC600V一路或二路电源在自动工况下无电应该怎么处理?

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1. public class A { 2. public void method1() { 3. B b=new B(); 4. b.method2(); 5. // more code here 6. } 7. } 1. public class B { 2. public void method2() { 3.C c=new C(); 4. c.method3(); 5. // more code here 6. } 7. } 1. public class C { 2. public void method3() { 3. // more code here 4. } 5. } Given: 25. try { 26. A a=new A(); 27. a.method1(); 28. } catch (Exception e) { 29. System.out.print(”an error occurred”); 30. } Which two are true if a NullPointerException is thrown on line 3 of class C?()

A. The application will crash.
B. The code on line 29 will be executed.
C. The code on line 5 of class A will execute.
D. The code on line 5 of class B will execute.
E. The exception will be propagated back to line 27.

精基准选择原则中()是指工艺基准和设计基准重合。

按工产的产品数量或所完成的工作量支付的工资是()

A. 计时工资
B. 计件工资
C. 加班工资
D. 正常工资

光合转化过程通过什么?发生在什么时候、什么场所?

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