【单选题】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?
【单选题】听力原文: The United Nations General Assembly has again called for an end to the United States economic embargo against Cuba. But Washington ignored the demand, insisting the sanctions are a bilateral iss...