单项选择题

Which of the following can best sum up the passage

A．Advantages and disadvantages of automation
B．Labor and the effects of automation.
C．Unemployment benefit plans and automation.
D．Social benefits of automation.

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单项选择题

The phrase calls for ( Para. 3 ) means _______.

A．causes
B．invokes
C．requires
D．invites

单项选择题

In order to get the full benefits of automation, labor will depend mostly on _______.

A．additional payment to the permanently dismissed workers
B．the increase of wages in proportion to the increase in productivity
C．shorter working hours and more leisure time
D．strong drive for planning new installations