手册是以带有耐用封面的活页形式还是以永久装订好的形式呈现由制造商来决定。
A.At the discretion of the manufacturer, the manual may either be prepared in loose-leaf form with a durable cover or a permanently bound form B.It is up to the manufacturer to decide whether the manuals presented as a durable loose leaf or as an eternal binding. C.The manufacturer is required to decide the format of the manual be prepared in loose-leaf form and a permanently binding form.正确答案A
