未知题型 Which of the following is true of the text?A．There should be some correlations between economy and family.B．Economic depression is sure to have caused the social instability.C．If the economy grows fast, the lower-earning partners will claim more help.D．Economic growth depends upon the happy relationship between social members.

未知题型 'Microchimerism' refers to a form. of maternal interference in which mothersA．keep telling their children what they should eat all day long.B．help sick children with their own cells left inside children's bodies.C．interfere with children's lives in an all-round way.D．leave all of their own cells, good or bad, inside their children's bodies.

判断题 在一定条件下必然发生的必然事件的概率为0。()