第7题: [单项选择]The woman believes that John_______. A. was playing a joke. B. was leaving Boston. C. was moving to Boston. D. was selling his house himself. 参考答案:C 答案解析:M: John must have been joking when he said that he was going to live in Boston.
W: Don’’t be so sur
第23题: [单项选择]RAM和外存储器的主要区别在于________。 A. RAM容量大,速度快,造价高,外存储器容量小,速度慢,造价低 B. RAM容量小,速度慢,造价低,外存储器容量大,速度快,造价高 C. RAM容量小,速度快,造价高,外存储器容量大,速度慢,造价低 D. 区别仅在于一个是在计算机里,一在计算机外 参考答案:C