【单选题】40) In the absence of technological progress, which of the following is true when the economy is operating at the steady state?
A.
The growth of output per worker is equal to the saving rate.
B.
The growth of output per worker is equal to the rate of investment.
C.
The growth of output per worker is zero.
D.
The growth of output per worker is equal to the rate of depreciation.
【简答题】袋中有7个球,其中4个红球,3个黑球,从袋中任取3个,试求取出的红球数不少于2个红球的概率为 。(答案用小数表示,保留两位小数)
【单选题】袋中共有7个大小相同的球,其中3个红球、2个白球、2个黑球.若从袋中任取3个球,则所取3个球中至少有2个红球的概率是( )
【单选题】大德十一年,元朝设立了()掌管漠北军事事务。
【简答题】袋中有7个球,其中4个红球,3个黑球,从袋中任取3个,试求取出的红球数X不少于2的概率为(答案用小数表示,保留两位小数)