平行结转分步法的主要缺点是需要进行成本还原。 （）

Whether a job can be classified as labor or work depends on______.

A．whether it is manual or mental

B．the tastes of the person who undertakes it

C．the job itself

D．the attitude of the society toward it

How is labor different from play （） People are considered ________ if their job has an _______ effect on them, yet they feel compelled to continue working because of ___________________ and the need to ________ their family. The opposite of labor is _____ which is a purely ______________; society does not care when or whether we play.

A．job

B．work

C．labor

D．profession

It is______ impossible to work with this noise around

A.especially

B.absolutely

C.unreasonably

D.unusually

A．many women are no longer able to join the labor force

B．many women become too weak to work

C．many women refuse to have children

D．the major job for women is no longer to give birth to and bring up children

劳工部门工作分析(Department of Labor job analysis)