某群众在马路上捡拾到一个钱包（内有人民币23000元），送交值勤民警寻找失主。民警寻找失主未果，乘机据为己有。民警的行为构成（） ["诈骗罪","贪污罪","侵占罪","职务侵占罪"]
Evaluate this SQL statement: SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME FROM EMPLOYEES e, DEPARTMENTS d WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID; In the statement, which capabilities of a SELECT statement are performed?（） ["selection, projection, join","difference, projection, join","selection, intersection, join","intersection, projection, join","difference, projection, product"]
下列属于动力密封的是（） ["油封","平垫密封","填料","离心密封"]
When will a skills-based CSQ that requires a skill competency of four (4) select an IPCC Express agent? （） ["if the ICD agent is available and has a skill competency of nine (9) in another skill defined in CRS ","if the ICD agent is available and has a skill competency of one (1) in the required skill for the CSQ","if the ICD agent is available and has a skill competency of seven (7) in the required skill for the CSQ","if the ICD agent is available and has a skill competency of three (3) in the required skill defined in CRS"]
圆钢与圆钢搭接的长度应为其自身直径的（）倍，并且要求上下搭接，焊接时要求双面焊接。 ["2","4","6","10"]
简述有规则游戏的指导要点。
