建筑的防火设计可分解为三个构成部分，其中不包括（）。
A.防烟排烟系统
B.建筑被动防火系统
C.建筑主动防火系统
D.安全疏散系统
参考答案：A
________ and short of breath, Andy and Ruby were the first to reach the top of Mount Tai. (2009浙江卷)
A．To be tried
B．Tired
C．Tiring
D．Being tired
Jane is______ researching into the life of wildlife and can’t spare time to care for his wife and children.
A．absorbed to
B．occupied in
C．engaged to
D．concentrated to
