单项选择题

The passage above mainly tells us ______.

A．something about the computer fixed on the Sphinx
B．about the present condition of the Sphinx
C．the experts are trying to find the cause so as to protect the Sphinx
D．about the course and cause of the damage

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热门试题

单项选择题

A contributing factor to the greenhouse effect is ______.

A．the earth's atmosphere
B．the world climate
C．the forest fire
D．the two poles

单项选择题

The greenhouse effect we are experiencing now is resulted from ______.

A．the present environmental pollution
B．the poisonous gases produced 40 years ago
C．the development of industry
D．the wastes dumped by people