单项选择题

In relation to the earth, the sun will move

A．7,000 miles per hour
B．fifteen degrees in one hour
C．1/48th of the world's circumference
D．twice as far as Polaris
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单项选择题
If the temperature at the earth's surface is twenty degrees Fahrenheit, the temperature in a coal mine 500 feet below the surface would, in degrees, be ______.
A．50
B．40
C．30
D．120
单项选择题
Which one of the following is NOT included in the trends of the 1990s
A．Vendors should lay great importance on service.
B．Hardware will account for a greater share of computer companies' revenue.
C．Trends of the 1990s in computer industry are difficult to predict.
D．Manufactures of monitors and printers will expand their business to automobile industry.
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