What does a single equals wild cart stand for?

Верно ли следующее утверждение:

The = (single equals) wild card stands for any number of words.

Верно ли следующее утверждение:

The == (double equals) wild card stands for a single word.

What are wild cards?

Верно ли следующее утверждение:

A pattern for Eliza is a list containing wild cards.

Верно ли следующее утверждение:

There is no single version of Linux.

Why is creating a single definition for computer addiction difficult?

3-D printers can also be used to produce the aerodynamic ducting on a jet-fighter as a single component.

Open Kernel Lab lets smartphones run applications, multimedia and radio functions on a single processor.