【单选题】It is the successful __________ education that creates a large number of excellent workers for Germany.
【判断题】Large government expenditures on infrastructure to rebuild East Germany and on transfer payments to East Germans caused hyperinflation in Germany.
【简答题】在进行场地踏勘时,若发现场地及周边有危险物质泄漏时,应迅速对泄漏情况及危害程度进行( ),并确定是否需要立即采取措施( )泄漏源。
【判断题】一般情况下,旅游者与其亲友进行会见时,导游人员可以不参加。( )
【单选题】称取 1.500g 奶粉样品,经灰化处理后配成溶液,然后用 0.05000mol/L EDTA 标准溶液滴定其中的 Ca 2+ (原子量为 40.08g/mol ),终点时用去 EDTA 标准溶液 12.10ml ,则奶粉中钙的百分含量为