单项选择题

Why was Kohoutek referred to as" the comet of the century"

A．It was thought to be extremely old.
B．It passes the Earth once a century.
C．Scientists predicted it would be very bright.
D．Scientists have been tracking it for a century.

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热门试题

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

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