单项选择题

We know from the passage that ______.

A．exposure to even tiny amounts of radiation is fatal
B．the effect of exposure to radiation is slow in coming
C．radiation is avoidable in space exploration
D．astronauts in spacesuits needn' t worry about radiation damage

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热门试题

单项选择题

The statistics recorded in the preference tests show ______.

A．Coca-Cola and Pepsi are people' s two most favorite drinks
B．there is not much difference in taste between Coca-Cola and Pepsi
C．few people had trouble telling Cola -Cola and Pepsi
D．people' s tastes differ from one another

单项选择题

The author' s purpose in writing this passage is to ______.

A．show that taste preference is highly subjective
B．argue that taste testing is an important marketing strategy
C．emphasize that taste and price are closely related to each other
D．recommend that blind tasting be introduced in the quality control of colas