What is the main idea of this passage?
(A)The number of requirements about working conditions.
(B)The rights and responsibilities between employers and employees.
(C)The Health Safety at Work.
(D)The legal requirements that employers and employees should meet.
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統計: A(68), B(1127), C(270), D(127), E(0) #339602
統計: A(68), B(1127), C(270), D(127), E(0) #339602