DBMS的含义是（ ）。

有SQL语句：　　SELECT DISTINCT系号FROM教师WHERE工资＞= ；　　ALL(SELECT 工资 FROM 教师 WHERE 系号=“02”)　　该语句的执行结果是系号（ ）。

A． “01”和“02”

B． “01” 和“03”

C． “01”和“04”

D． “02”和“03”

Many kids ________ the net bar, and _____had a bad effect on their studies.

A．are addicted to; it

B．get engaged in; which

C．are related to; what

D．are addicted to; which