顶空气相色谱法适用于沸点低于（）℃的挥发性卤代烃的测定。
参考答案：150
I’m not a little tired today after giving the room a thorough cleaning and I have never had ______ today. [ ]
A. as tiring a day as
B. as a tiring day as
C. tiring as a day as
D. day as a tiring as
