当系统接受热量时系统的熵（）；当系统放出热量时系统的熵（）。 ["增加；减少","减少；增加","增加；增加","减少；减少"]
If a victim is unconscious，you should first look for evidence of（）. ["high fever","head injury","broken limbs","irregular breathing"]
（）是连接ISDN局和NT1之间的规范。 ["A参考点","Z参考点","S参考点","U参考点"]
进行培训的需求分析，一般应从哪几方面入手（）。 ["任务分析","人员分析","管理者分析","组织分析"]
A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）. ["double-acting engine","opposed pistons engine","single-acting engine","horizontal acting engine"]
氢气压缩机抽气量不足原因分析及处理措施有哪些？
