单项选择题

The report is mainly about

A．the operation of Guangzhou Baiyun International Airport
B．where people should go to visit after SARS
C．the prediction of what will happen to transport and tourism after SARS
D．the resuming service in Guangzhou Baiyun International Airport

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热门试题

单项选择题

Why did one scientist expose birds to artificial daylight

A．To test the relationship between daylight and a disease of the glands common to birds.
B．To test the relationship between daylight and migration.
C．To test the relationship between migration and temperature.
D．To test the relationship between daylight and changes in the season.

单项选择题

This passage supports the belief that ______.

A．exact reasons for migration are not known
B．birds migrate because of changes in temperature
C．the ancestral home of all birds was the tropics
D．glaciers caused birds to migrate