根据您提供的信息，这里是对1995年全国硕士研究生入学统一考试英语试题Section I Use of English的解析：
1. 题目内容：
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep. 1 kind of _______ sleep is more difficult to understand. At a recent meeting of the Society for Sleep Research in Minneapolis, experts described new experiments that offer fascinating explanations of non-_______ sleep. It has long been known that total sleep is 100% fatal to rats, yet _______ examinations of the dead bodies of such rats have shown that their immune systems — the self-protecting mechanism against disease — seem to have collapsed.
2. 解析：
第一个问题考查的是不定代词的用法。句子提到睡眠分为REM睡眠和非REM睡眠，而后面的“1 kind of _______ sleep”指的是这两种睡眠。因此，正确答案是B，意为“人们对这两类睡眠都没有完全了解”。
第二个问题考查动词词义辨析。句子中的“intended”意为“想要，打算，企图”，正确的动词形式是“intended”，表示“打算做某事”。
3. 答案：
第一个问题：B. people have no complete understanding of the two kinds of sleep.
第二个问题：A. intended