单项选择题

Motion pictures ______.

A．cause inertia of the eye
B．show a succession of unrelated movement
C．show consecutive phases of movement which appear continuous
D．show each phase of movement for one-half of a second

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单项选择题

Plateau's experiments were the first steps leading to the invention of ______.

A．eyeglasses
B．telescopes
C．bifocals
D．motion pictures

单项选择题

The word software , as used by the author, is close in meaning to a number of ______.

A．computers that the programs are in
B．programs that a computer simplifies
C．instructions that instruct a computer what to do
D．programs that tell a computer to give instructions