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【多选题】
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.
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【单选题】Some industries, such as construction and mining, have been ______.
A.
male-dominating
B.
male-domination
C.
male-dominated
D.
male-dominant
【简答题】已知正弦交流电路中某负载上的电压瞬时值解析式为 u =14.1sin(314 t- π /3)V ,则此电压的最大值为 ______V ;有效值为 ______V ,频率为 ______H Z ,初相位为 _______ 。
【简答题】A．Some industries make great profit with their dominant status. B．Some corruptive officials exploit farmers' profit with superiority. C．Natural resources are located mostly in rural areas. D．Cities ar...
【单选题】Why is it difficult to improve the procedures for fixing wage levels?
A.
Some industries have no unions.
B.
Unions are not organized according to industries.
C.
Only 55 per cent of workers belong to unions.
D.
Some unions are too powerful.
【简答题】In some developing countries, the result of protecting local industries from competition is ______.
【简答题】已知正弦交流电路中某负载上的电压瞬时值解析式为 u =14.1sin(314t - 60°)V ,则此电压的最大值为______V;有效值为______V,频率为______Hz,初相位为_______。
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