政府的行动战应该围绕受害者群体的需求展开，包括哪些需求（）。 ["安全需求","物资需求","信息需求","情感需求"]
In a single acting, two-stroke/cycle, diesel generator engine, the power impulse in an individual cylinder occurs （） ["once every crankshaft revolution","once every two crankshaft revolutions","once every piston stroke","twice every piston stoke"]
（）是指一个企业内部全体人员共同持有和遵循的价值标准基本信念和行为准则。 ["经营思想","企业文化","价值观念","工作作风"]
Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is（） ["entirely constant pressure","entirely constant temperature","a combination of constant volume and constant pressure","a combination of constant temperature and constant pressure"]
什么是长丝？
什么是零强温度？
