以下属于宏观环境分析的关键要素的是（）。 生活环境因素。 经济环境因素。 社会和文化环境因素。 政治与法律环境因素。 以上都不是。
The FIRST thing to do to ensure that a refrigeration unit will not start while undergoing repairs, is to （）. secure and tag the electrical circuit。 place a crow bar in the flywheel of the unit。 inform all persons in the area not to start the unit。 make a log book entry。
In case of any loss or misfortune it is the duty of（）to take such measures as may be reasonable for the purpose of averting or minimizing a loss which would be recoverable under this insurance. the Assured and their servants and agents。 the Assurer and his servants and agents。 the Charterer and his servants and agents。 the Operator and his servants and agent。
通信电源为什么要接地线？其作用？
《八十天环游地球》中福格未在旅途中使用过（）。 大象。 雪橇。 轮船。 自行车。
根据上级颁发的（）编制企业各类设备的现场运行规程、制度，经总工程师批准后执行。
