A.table>tbody>tr:nth-child(even)
B.table>tbody>tr:nth-child(odd)
C.table>tbody>tr:nth-child(2n+1)
D.table>tbody>tr:nth-child(2n)
A.ALTER TABLE S (ADD CNAME CHAR(8))
B.ADD TABLE S ALTER (CNAME CHAR(8))
C.ALTER TABLE S ADD (CNAME CHAR(8))
D.ADD TABLE S (CNAME CHAR(8))
A.ready
B.reserved
C.prepared
D.occupied
A.display session table
B.display firewall session table
C.display firewall session content
D.display firewall session
B.create table region1(ctid_value int);
C.create table region1(ctid_value int) replication;
D.以上都不正确