通风设备的作用是什么?
参考答案:
通风设备的作用是:向井下输送新鲜空气,稀释和排除有毒、有害气体,调节井下所需的风量、温度、湿度,改善工作条件,保证安全生产。
_________that developed countries want to limit the development of the developing countries in the climate conference in Copenhagen.
A.It is no possibility
B.It is small wonder
C.There is no denying
D.There is no chance
中风患者什么情况采用头针最适宜
A.昏迷、血压过高时B.病情及血压稳定时C.脑溢血急性期D.高热,心衰,急性炎症时E.偏瘫半年以后