【判断题】行列式某一行的元素与另一行的对应元素的代数余子式乘积之和等于0.
【单选题】________ is often the case,one third of the workers have over-fulfilled the production plan.
【判断题】 Cause and effect is often used to explain the writer’s view.
【单选题】关于风险与保险的关系,下列说法正确的是( )。 Ⅰ.风险是保险产生和发展的前提 Ⅱ.保险的发展是风险发展的客观依据 Ⅲ.保险是风险管理的传统有效的措施 Ⅳ.风险管理技术要受保险经营效益的制约
【单选题】______ is often the case with a new idea much preliminary activity and optimistic discussion produce no concrete proposals.
【简答题】 In winter the weather in England is often very cold. In spring and autumn there are some cold days, but there are also days when the weather is warm. The weather is usually warm in summer. It is som...
【判断题】行列式某一行的元素与另一行的对应元素的代数余子式的乘积之和一定等于0.
【简答题】 Fill in the following blanks with the words or expressions given below. Change the form where necessary. 1. Reading and writing are two different ________ 2. Knowledge (知识) is _________ by learning ...