【单选题】下列关于地磁场的描述正确的是( )
A.
指南针总是指向南北,是因为受到了地磁场的作用
C.
地球周围的地磁场的磁感线是从地磁南极出发到地磁北极
【单选题】The Solow residual attempts to measure the amount of output not explained by
A.
technological progress.
B.
the direct contribution of labor and capital.
D.
the amount of a nation's human capital.
【多选题】下列关于测量误差的说法中,属于错误说法的是( )。
B.
测量误差可以用绝对误差、相对误差、中误差和容许误差进行表示
【单选题】下列关于磁场的描述,正确的是( )
C.
磁体周围的磁感线都是从磁铁的 S 极出发回到 N 极
D.
在磁场中某点,磁场方向与放在该点的小磁针 S 极所指方向相同
【单选题】下列关于中误差的说法中,错误的是________。
A.
只要在一组观测值中,有大误差存在,中误差迅速增大。
【单选题】The Solow residual equals the percentage change in output:
A.
plus the percentage changes in factor inputs weighted by each factor's share of output.
B.
minus the percentage changes in prices of factor inputs.
C.
minus the percentage changes in factor inputs weighted by each factor's share of output.
D.
plus the percentage changes in each factor's share of output.
【单选题】三位数的密码锁,每个拨号盘可以有0-9十位数,问可以组成多少个密码?
【单选题】Growth in the Solow residual was slowest in US in the
【简答题】索洛增长模型(Solow growth model)