在收到电子邮件中，显示乱码的原因往往可能是 （ ） 。
- A.字符编码不统一
- B.受图形图像信息干扰
- C.电子邮件地址出错
- D.受声音信息干扰
正确答案及解析
正确答案
解析
电子邮件地址出错会导致无法收到邮件，图形声音干扰只会影响图形和声音
统的可移植性指将系统从一种硬件环境/软件环境下移植到另一种硬件环境/软件环境下所需付出努力的程度。在给出的备选项中，可维护性、可靠性和可用性等方面的提高，将有利于提高系统可移植性。而由于要提高系统效率，则势必存在一些与具体硬件/软件环境相关的部分，这些都是不利于系统移植工作的因素。
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