单选题：The expression （ ）can **NOT** express the statement "both x and

The expression （ ）can **NOT** express the statement "both x and y are zero". @[C](1)

A. x==0 && y==0
B. !x && !y
C. x==0 || y==0
D. !(x || y)




A.x==0 && y==0
B.!x && !y
C.x==0 || y==0
D.!(x || y)


答案：C