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问题 单项选择题

对待排序文件的初始状态不作任何要求的排序方法有( )。

A．直接插入和快速排序

B．直接插入和归并排序

C．归并和快速排序

D．归并和直接选择排序

答案

参考答案：A

解析： 只有归并排序要求待排序文件“部分排序” (把待排序的文件分成若干个子文件，每个子文件内的记录是己排序的)。

阅读理解
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
Earn Money This Summer with Sunny Libraries!
Do you have too much free time this summer vacation? Do you need a summer job to earn extra money? Do you want to be involved in your community (社区)? Sunny Area Library System (SALS) has job opportunities for high school students. These are good chances to get work experience.
Book Theater brings children' s book stories to life. It has shows at all Sunny Libraries. Applicants should enjoy performing in front of an audience and working with young children.
Work Hours:
Practice: Fridays  4:00 pm — 6:00 pm
Performance: Tuesdays  10:00 am
Rate of Pay: $16/performance
Computer Tutor helps guests to deal with technology problems, involving Internet searches and using the SALS Website to find materials. Applicants should have computer skills.
Work Hours:
Monday—Friday  9:00 am—5:00 pm
Rate of Pay: $ 8/hour
Bookmobile helps the driver find the routes to libraries. The truck you work in is air-conditioned, and the driver is friendly. Applicants must be able to lift heavy boxes.
Work Hours:
Sunday and Friday  9:00 am — 4:00 pm
Rate of Pay: $10/hour
Reader Desk provides service with a smile while checking materials in and out to guests. Friendly attitude and ability to work on library data system required.
Work Hours:
Monday—Tuesday  8:00 am—4:00 pm
Rate of Pay: $ 7.50/hour
小题1:If you are interested in acting,             should be your choice.
A．Book TheaterB．Bookmobile
C．Computer TutorD．Reader Desk
小题2:If you get the job of "Bookmobile", you are expected to                 .
A．work with young childrenB．lift heavy boxes
C．check materials for guestsD．repair computers
小题3:The purpose of the advertisement is to                 .
A．attract students to librariesB．raise money for libraries
C．introduce new booksD．offer job opportunities
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判断题

发生在2007年4月份的弗吉尼亚理工大学的枪击案，是美国至此发生最惨烈的校园暴力事件。
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