单选题：The expression ___can NOT express the statement "both x and y ar

The expression ___can NOT express the statement "both x and y are zero". @[C](2)

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