Assume that in 1990 there were 3,000,000 fourth-graders in the United States. How many fewer of those 3,000,000 students used a computer in school at least once a week in 1994 than in 1990?
A.
100,000
B.
250,000
C.
500,000
D.
600,000
E.
750,000
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参考答案:
举一反三
【单选题】My son is very shy, but can you imagine ____ at the English party? [ ]