A.20---25 B.17---19 C.11---16 D.1---10
參考下列語句: 問,上述語句創(chuàng)建了幾個連接池來管理這些Sqlconnection對象?()
A.1 B.2 C.3 D.4
A.executescalar B.executexmlreader C.executereader D.executenonquery