问题：

[多选] Which statements are true concerning the effect of the >> and >>> operators?（）  

A . For non-negative values of the left operand， the >> and >>> operators will have the same effect.
B . The result of （-1 >> 1） is 0.
C . The result of （-1 >>> 1） is -1.
D . The value returned by >>> will never be negative as long as the value of the right operand is equal  to or greater than 1.
E . When using the >> operator， the leftmost bit of the bit representation of the resulting value will always be the same bit value as the leftmost bit of the bit representation of the left operand.