第3题: [单项选择]Passage Two Questions 30 to 32 are based on the passage you have just heard.A. She lent her some serious classics.B. She cultivated her taste for music. C. She discovered her talent for dancing. D. She introduced her to adult plays. 参考答案:D 答案解析:[解析] 30-32 The teacher who did the most to encourage me was, as it happens, my aunt. She was
第23题: [单项选择]以络合反应为基础的是() A. 配位滴定法 B. 非水滴定法 C. 两者皆是 D. 两者均不是 参考答案:A
第24题: [单项选择]假设磁盘的每个磁道分成8个块,文件有8个记录,每个记录的大小与块的大小相等,设磁盘转速为32ms/转,每读出一块后需要2ms的处理时间。若忽略其他辅助时间,如果顺序存放这些记录顺序读取,处理该文件要______时间。 A. 254ms B. 283ms C. 300ms D. 310ms 参考答案:D 答案解析:[解析] 由题目所给条件可知,磁盘转速为32ms/转,每磁道存放8个记录,因此读出1个记录的时间是;32/8=4ms。读出并处理记录A需要6ms,此时读写头已转到了记录B的中间,因此为了读出记录B,必