软件文档是软件可维护性的重要因素，它主要分为系统文档和（）文_爱下问搜题

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问题填空题

软件文档是软件可维护性的重要因素，它主要分为系统文档和（）文档两类。

答案

参考答案：用户

解析：

软件文档是影响软件可维护性的重要因素。软件系统的文档可以分为用户文档和系统文档两类。用户文档主要描述系统功能和使用方法，并不关心这些功能是怎样实现的。系统文档描述系统设计、实现和测试等方面的内容。

完形填空

Do you feel upset when you hear that your school might not allow cell phones? Do you break into a cold sweat when your cell phone battery(电池) dies? If you        live without your cell phone, you might have a       .
A recent study found that some people could be        to their cell phones. The study was conducted at Staffordshire University in England. About 40 percent of students        said they couldn’t do without their cell phones. About 90% said they took their        with them everywhere. One third of students surveyed said they used cell phones to        themselves up.
The study also asked students 18 to 25 questions designed to        addictive behavior. The results found that one in six cell phone users have a lot in        with gambling addicts (赌瘾). Some people said they sometimes lied about their cell phone use.        admitted stealing to pay for their cell phone habit.
Dr David Sheffield,        conducted the study, said he wasn’t surprised by the       . “Students use their phones       , and this has both positive        such as staying in touch with friends and family, and negative ones too, such as        costs and social costs,” he told Weekly Reader. “The most        finding was that a number of people reported they had        a relationship or job because they spent too much time on mobile phones .”
     part of the study, some students agreed to take a        from their cell phones. After three phone-free days, students reported feeling less        about their daily lives. That might be a        reason to hang up the phone!

A．discoveries

B．explorations

D．experiments

A．interesting

单项选择题

全国人民代表大会常务委员会对国务院制定的同宪法相抵触的行政法规( )。

A．有权改变或撤销

B．有权撤销，无权改变

C．有权改变，无权撤销

D．无权撤销，无权改变