单项选择题

What is the main topic of the passage

A．What was learned from Kohoutek
B．What was disappointing about Kohoutek
C．Where Kohoutek was spotted
D．How Kohoutek was tracked
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单项选择题
Which of the following questions is best answered by information gained from Kohoutek
A．Where were comets formed
B．When were comets formed
C．Where was the solar system formed
D．How was the solar system formed
单项选择题
According to the passage, what is one major component of Jupiter
A．Hydrogen cyanide.
B．Methyl cyanide.
C．Hydrogen.
D．Ammonia.
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