填空题

阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。
While a personal computer should continue to perform predictably for years, veteran Windows users know all too well that system instability is a fact of life. Yet you can minimize the glitches that you experience with your computer by heeding the tips below.
2. If you run Windows 98 or Windows Millennium, your computer should have at least 128 megabytes (MB) of RAM--and more if you find that your hard drive is churning a lot as you work with your applications. You can also get by with 128 MB of RAM if you use Windows NT or Windows 2000, but these operating systems will run much more smoothly if you have 256 MB of RAM or more.
3. Beta software, by its very nature, is pre-release software—meaning that it still has significant known bugs (or defects). The same goes, unfortunately, for many shareware programs. The authors of shareware programs, typically, have much less time and fewer resources available for testing their programs. Consequently, it’ s far more common to find shareware software that is buggy.
4. No-name hardwares may be cheaper and sometimes just as good as name-brand products, but name-brand products usually became well-known because of their reliability. It’s also wise to buy products from reputable companies because Windows will more often support the hardware that you purchase. If you are starting out with computers, it’s also a good idea to buy ready-made systems from major manufacturers. These are likely to have tested thoroughly with your operating system, and you will generally experience fewer problems.
5. No matter how well your system runs when you get it, the day will come when it will need to be replaced. Hopefully, you will replace it because the technology has become outdated, but you may need to replace it also because the hard drive crashes or you begin experiencing problems that no one can figure out. That’s why it’s important to back up your important files regularly. Whether you use a tape backup device or a CD-RW drive, it’s important to map out a regular backup schedule and to stick to it. Paragraph 3 ______