Linux查看物理CPU个数的指令是：（）
A.cat/proc/cpuinfo|grep"pyhsicalidnumber"|sort-u|wc–l@cat/data/cpuinfo|grep"pyhsicalid"|sort-u|wc–l@cat/num/cpuinfo|grep"pyhsicalid"|sort-u|wc–l@cat/proc/cpuinfo|grep"pyhsicalid"|sort-u|wc–l B.cat/data/cpuinfo|grep"pyhsicalid"|sort-u|wc–l@cat/num/cpuinfo|grep"pyhsicalid"|sort-u|wc–l@cat/proc/cpuinfo|grep"pyhsicalid"|sort-u|wc–l C.cat/num/cpuinfo|grep"pyhsicalid"|sort-u|wc–l@cat/proc/cpuinfo|grep"pyhsicalid"|sort-u|wc–l D.cat/proc/cpuinfo|grep"pyhsicalid"|sort-u|wc–l正确答案D
