题型:单项选择题 ---Do you often have a good time _______ after-school activities?--- Of course, we do. And we always have a lot of time _______ football.A.to do ; to practiceB.doing; practicingC.to do; practicingD.doing; to practice 查看答案
题型:单项选择题 对于投资额大,投资期限长的技术方案,经济效果评价主要应采用()。A.静态定量经济效果评价指标B.静态定性评价经济效果指标C.动态定量经济效果评价指标D.动态定性经济评价效果指标 查看答案