81. Given:
 1. interface DoStuff2{ 
2. float getRange(int low, int high)；} 
 3.
 4. interface DoMore {
 5. float getAvg(int a, int b, int c)；} 
6. 
7. abstract class DoAbstract implements DoStuff2, DoMore{} 
8.
 9. class DoStuff implements DoStuff2{ 
10. public float getRange(int x, int y){return 3.14f；}} 
11. 
12. interface DoAll extends DoMore{ 
13. float getAvg(int a, int b, int c, int d)；} 
What is the result?
(A) The file will compile without error.
(B) Compilation fails. Only line 7 contains an error.
(C) Compilation fails. Only line 12 contains an error.
(D) Compilation fails. Only line 13 contains an error.
(E) Compilation fails. Only lines 7 and 12 contain errors. F. Compilation fails. Only lines 7 and 13 contain errors. G. Compilation fails. Lines 7, 12, and 13 contain errors.

答案：登入後查看
統計： A(0), B(0), C(1), D(0), E(0) #2722974