“活到老学到老”是现代教育( )特点的要求。
A．大众性
B．公平性
C．终身性
D．未来性
参考答案：C
Though it is the first time they have met, they talked as if they _____ friends for many years.
A．are
B．were
C．had been
D．have been
LB3C2046锅炉受热面管道的长期过热爆管的破口外观特征怎样？
