Liquid hydrogen should be stored in stainless steel tanks with double walls filled with __________.

A．feel alienated from their work and their firm either in public or in private
B．feel they are just indifferently taken advantage of by the bureaucratic machine
C．think that the managers deprive them of their chances of personal development
D．believe that they should have a lot of control over their own working lives

A．The growing importance of leisure time can divert people's attention from what he suffers from his work.
B．To a significant extent, our work decides our social status and our living standard.
C．It is now equally important for a worker to seek both material and psychological satisfaction from doing his work.
D．It is not justifiable to advise people to ignore the suffering caused by their work and care more about their leisure activities.