单项选择题

It is implied in the first paragraph that ______.

A．the purpose of taste tests is to promote the sale of colas
B．the improvement of quality is the chief concern of the two cola companies
C．the competition between the two colas is very strong
D．blind tasting is necessary for identifying fans

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热门试题

单项选择题

The best title for this passage would be ______.

A．The Atmosphere and Our Environment
B．Research on Radiation
C．Effects of Space Radiation
D．Importance of Protection Against Radiation

单项选择题

According to the first paragraph, the atmosphere is essential to man in that ______.

A．it protects tim against the harmful rays from space
B．it provides sufficient light for plant growth
C．it supplies the heat necessary for human survival
D．it screens off the falling meteors