单选题:Using command substitution, how would you display the value of t
Using command substitution, how would you display the value of the present working directory? @[A](1)
A. echo $(pwd)
B. echo pwd
C. $pwd
D. pwd | echo
A.echo $(pwd)
B.echo pwd
C.$pwd
D.pwd | echo
答案:A
A. echo $(pwd)
B. echo pwd
C. $pwd
D. pwd | echo
A.echo $(pwd)
B.echo pwd
C.$pwd
D.pwd | echo
答案:A