A.3 17 * * * /bin/echo“how are you?”
B.0 3 * * * /bin/echo“how are you?”
C.0 0 3 * * /bin/echo“how are you?”
D.*/3 * * * * /bin/echo“how are you?”
SOUND: ECHO ::
A.sight:rainbow
B.episode:television
C.light:reflection
D.affection:attachment
E.observation:microscope
A.Narcissus is the name of a flower.
B.Narcissus tried to hug Echo, but in vain.
C.Narcissus was drowned in the pool.
D.Narcissus saw a beautiful girl in the pool.
A.12345678910
B.1234567890
C.0123456789
D.Notice提示信息
A.[root@lala ~]# a=5 [root@lala ~]# echo $a
B.[root@lala ~]# export a=4 [root@lala ~]# bash [root@haha ~]# echo $a
C.[root@lala ~]# a=1.6 [root@lala ~]# export
D.[root@lala ~]# bash [root@haha ~]# echo $a