教育具有的特殊功能是()
A．社会性规范
B．即时价值
C．延时价值
D．加速个体发展
参考答案：D
等腰三角形的底边长为10cm，顶角是底角的4倍，则该等腰三角形腰上的高是______cm．
There has been a () lack of communication between the union and the management.
A. regretful
B. regrettable
C. regretting
D. regretted
