受检热力入口数不得小于该建筑小区或建筑群总热力入口数的（）。
A.5%
B.10%
C.15%
D.50%
参考答案：B
Cheer up! Everyone may have periods in their lives everything seems tough．
A．which
B．where
C．when
D．that
消渴之名，首见于______，其后______立专篇进行讨论，并最早提出治疗方法。
