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The major point discussed in the passage is

A．the importance of developing writing skills.
B．the complexities of spelling.
C．the correct way of marking compositions.
D．the relationship between spelling and the content of a composition.

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.

单项选择题The writer seems to think that the teacher's judgement on that sensitive piece of writing is

A．unfair.
B．reasonable.
C．foolish.
D．careless.

单项选择题Teachers encourage the use of dictionaries so that

A．students will be able to express their ideas more freely.
B．students will have more confidence in writing.
C．teachers will have less trouble in correcting mistakes.
D．students will learn to be independent of teachers.

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