[问答题] 解释软件安全的含义，说明威胁软件安全的主要形式及防范措施。

若将控制风险评估为高水平，则意味着内部控制（）及时防止或者发现和纠正某项认定中的重要错报或漏报的（）。 ["不能；可能性很小","能；可能性很大","不能；可能性很大","能；可能性很小"] 什么是建筑节能？ However, reception of certain types of MSI messages, such as shore to ship distress alerts and navigational and meteorological warning are（）. ["selective and can be suppressed by ships","mandatory and can not be suppressed by ships in the affected area","not very important so that ships don‟t require them","received by all ships wherever they are"] 装载机工作（）小时后更换前后驱动桥齿轮油。 ["50","100","2400","1000"] The International SafetyNet Service is able to address the call to（）. ["all vessels","selected groups of ships","a particular ship","A, B, C are all right"] 解释软件安全的含义，说明威胁软件安全的主要形式及防范措施。