衡量教育经济效率的理论指标体系包括()
A.能力工资
B.知识和技能标准分
C.专业改变率和专业人员缺员率
D.培养周期
参考答案:A, B, C, D
过滤操作中不需要用到的仪器是( )
A.烧杯
B.漏斗
C.量筒
D.玻璃棒
Before my father moved off, he told me again and again that I should ______ the rules and regulations of the school.
A.make
B.watch
C.remain
D.observe