高压蒸汽灭菌物品，保存时间不超过( )。
A．5天B．2周C．3周D．4周E．5周
参考答案：B
解析：[知识点] 高温灭菌法
-Excuse me, but can you tell me which road I should take to the post office?
-______ of the four roads will do.[ ]
A. Any
B. Neither
C. Both
D. Every
什么是房间采暖热负荷？其包括哪些内容？
