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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.

单项选择题What can be inferred from the passage

A．Most scientists are confident that the spacecraft will work well.
B．A more ambitious orbital flight will follow this mission.
C．The author is quite sure that this mission will make impossible technologies seem possible.
D．The key of the engineering of Cosmos I is building wings that can open and pivot.

单项选择题What is the energy source of this so-called solar-sail vehicle

A．Sunlight.
B．Nuclear.
C．Wind.
D．Electricity.

单项选择题What was Thompson’s first reaction to the scene ahead

A．He remained in the saddle for several minutes spellbound.
B．He immediately jumped down and went forward.
C．He waited until his bed was ready and then dismounted.
D．He rode to the mound and stared at the structure before him.