保险合同的特征包括（） ["保险合同是无偿合同","保险合同是保障合同","保险合同是单务合同","保险合同是附合合同","保险合同是射幸合同"]
Halon extinguishes a fire by（）. ["breaking the chain reaction","smothering the fire","cooling the fire","coating the fuel with a nonflammable surface"]
论述工作分析的原则。
直接融资工具包括企业债券、商业票据、公司股票、人寿保险单等。
Halon extinguishers used on a class C fire should be directed at the（）. ["base of the equipment","top of the equipment","power source","source of the fire"]
简要概括“宁波帮”与“晋商”、“徽商”在经营理念上的差异之处。
