单项选择题

The information superhighway came into existence because of ______.

A．copper wire cables
B．satellite communication
C．optical fibers
D．laser and optical fibers
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单项选择题
What of the following correctly describe Cosmos I
A．It is a 3-ft. metal pod.
B．It has eight 35-ft. metallic wings.
C．It can fly an altitude above 260 miles.
D．When it flies back to Earth, it will fall into pieces.
单项选择题
What does brainchild in the paragrapth 4 mean
A．Patent.
B．Invention.
C．Hope.
D．Pride.
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