第19题: [单项选择]Basic research is vital because _______. A. it leads to results that can be appreciated B. it is driven out by applied research C. it provides the Basis for scientific progress D. its results cannot be anticipated 参考答案:C 答案解析:[解析] 事实细节题。第一段第二句“Basic research is the very heart of science，．．．a capital that must be constantly i
第20题: [单项选择]某施工企业与业主签订了一项总金额为2000万元的建筑合同，合同规定的建设工期为3年，第一年实际发生合同成本700万元，年末预计为完成合同尚需发生成本1150万元；第二年实际发生合同成本800万元，年末预计为完成合同尚需发生成本300万元。该企业第一年、第二年度确认的合同完工进度分别为( )。 A. 35%和83.33% B. 35%和75% C. 37.84%和75% D. 37.84%和83.33% 参考答案:D
