BOT是一种( )的项目融资方式。
A．必须追索
B．无限追索
C．无需追索
D．有限追索
参考答案：D
The children went home from the grammar school, their lessons _____ for the day. [ ]
A. finishing
B. finished
C. had finished
D. were finished
有关疏散走道两侧隔墙的耐火极限说法，不正确的是（）。
A.一级耐火等级的建筑不低于1.50h
B.二级耐火等级的建筑不低于1.00h
C.三级耐火等级的建筑不低于0.5h
D.四级耐火等级的建筑不低于0.25h
