It is believed that dragon is an important ________ of the Chinese people.

单选题

It is believed that dragon is an important ________ of the Chinese people.

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单选题

It is true that a townhouse is more comfortable ( ) ,but it is beyond our budget.

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单选题

It is believed lifelong learning is a crucial response ______ the challenge of the global knowledge economy.

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单选题

It is in the ___________ that filtration occurs.

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材料题

idea of how big it was. Thats why early man believed that the earth was small and flat.Such ideas appeared from the evidence they had.5 If you watch the stars night after night,you will see them rise and set.As you look at the sky,it is not difficult to imagine that you are in the center of a vast collection of twinkling（闪烁）lights. Some early astronomers（天文学家）believed the sky was a crystal shell or series of crystal shells,one inside the other. They believed this because that is what the night

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