在研究某城市工业企业生产时,某个工业企业生产工人人数这个概念是指( )。
A.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520line-height%253A%252019.0px%253B%2520font%253A%252013.0px%2520%2526%252339%253BHelvetica%2520Neue%2526%252339%253B%257D 数量指标
C.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520line-height%253A%252019.0px%253B%2520font%253A%252013.0px%2520%2526%252339%253BHelvetica%2520Neue%2526%252339%253B%257D 变量值
D.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520line-height%253A%252019.0px%253B%2520font%253A%252013.0px%2520%2526%252339%253BHelvetica%2520Neue%2526%252339%253B%257D 标志总量