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单选题
819. 手册应易于修订,它们可以是活页形式,带有耐用的多环形封面或者永久性装订
A
Handbooks shall be readily revisable. They may be in loose-leaf form, with durable, multi-ring cover, or permanently bound;
B
Handbooks shall be easily revisable. They may be in loose-leaf form, with durable, multi-ring cover, or permanently bound;
C
Handbooks shall be readily changeable. They may be in loose-leaf form, with durable, multi-ring cover, or temporary bound;
答案解析
正确答案：A
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