土地报酬递减是指在技术和其他要素不变的条件下，对相同面积的土地连续追加某种要素的投入所带来的报酬的增量(边际报酬)迟早会下降。( )
参考答案：对
So well _____ in 2009 that the world has agreed that it was the year of China. [ ]
A. did China perform
B. China has performed
C. was China performed
D. China is performing
我方出口货物2300件。对外报价为3美元/件CFR利物浦。为避免漏保，客户来证要求我方装船前按CIF总值代为办理投保手续。查得该货的保险费率为0.8%，试问，我方对该货投保时，投保金额和应缴纳的保险费是多少(保留两位小数)
