单项选择题

Why is it that the data gathered on penguins over the years may now be worthless()

A. It is already outdated.
B. Many of the penguins have died for lack of food.
C. Their wearing of flipper bands has affected the accuracy of the data.

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Why is IBM’s ThinkPad keyboard designed with lights on it()

A.Teenagers usually take notes in the dark during lectures.
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How often does the man play cricket()

A. Seldom.
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