题目内容:
(29)
A.(-d|d)d*E(-d|d)d*|(-d|d)d*.d*(ε|E(-d|d)d*) B.-(d|d)dd*(.|ε)d*(ε|E(-d|d)d*)
C.(-|d)dd*E(-|d)d*|(-d|d)dd*.d*(ε|E(-|E(-|d)d*)
D.(-d|d)dd*E(-d|d)d*|(-d|d)dd*.d*(ε|E(-dd*|dd*))
参考答案:
答案解析: