Automation System
An operational amplifier:

None of these
can be used to subtract two or more signals
can be used to sum two or more signals
All of these
uses the principle of feedback

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Automation System
High-level languages:

are "procedure-oriented"
are very difficult to use
require knowledge of the computer design
None of these
cannot be used with automatic systems.

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Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

None of these
technical assistance must be provided to the user.
there should be a common 3-D part description system.
the system must make provision for new techniques.
the user must have access to both hardware and software

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