Slack time is ______.

A:a way of decreasing the time required for decision making B:not used to level resources C:the same as float time D:used to assist in developing a timetable of the major components of a schedule

Don't get slack at you work.（）

A:lazy and careless     B:tiresome or bored C:depressed          D:diligent

Don't get slack at you work.（）

A:lazy and careless B:tiresome or bored C:depressed D:diligent

Owing to the slack demand ______ their products for the time being, they do not think it advisable to buy the machine.

A:of B:for C:on D:in

Our business has been slack （） three months.

A:in B:within C:over D:for

Our business has been slack ( ) three months.

A:in B:on C:over D:for

Our business has been slack ______ three months.

A:in B:within C:over D:for