单项选择题
A.echo $* B.echo $# C.echo $？ D.echo $!
A.make；make install；make clean；./configure B../configure；make install；make clean；make C.make install；make clean；make；./configure D../configure；make；make install；make clean
A.chmod +x test B.chmod -x test C.chmod 400 test D.chmod 600 test