单项选择题

The first two paragraphs tell us a true story of ______.

A．international cooperation via the Internet
B．how dangerous thallium can be to humans
C．how one can get help from the Internet
D．the girl’s recovery from thallium poisoning

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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 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.