Dream is a story that a person watches or even takes part in during sleep.Dream events are imaginary,but they are related to real experiences and needs in the dreamer’s life.
They seem real while they are taking place.Some dreams are pleasant,others are annoying,and still others are frightening.
Everyone dreams,but some persons never recall dreaming.Others remember only a little about a dream they had just before awakening and nothing about earlier dreams.No one recalls all his dreams.
Dreams involve little logical thought.In most dreams,the dreamer cannot control what happens to him.The story may be confusing,and things happen that would not happen in real life.
People see in most dreams,but they may also hear,smell,touch,and taste in their dreams.Most dreams occur in color.But persons who have been blind since birth do not see at all in dreams.
Dreams are a product of the sleeper’s mind.They have included events and feelings that he has experienced.Most dreams are related to events of the day before the dream and strong wishes of the dreamer.Many minor incidents of the hours before sleep appear in dreams.Deep wishes or fears-especially those held since childhood often appear in dreams,and many dreams fulfil such wishes.Events in the sleeper’s surrounding-a loud noise,for example,may become part of a dream,but they do not cause dreams.
Some dreams involve deep feelings that a person may not realize he has.Psychiatrists often use material from a patient’s dreams to help the person understand himself better.
Dreaming may help maintain good learning ability,memory,and emotional adjustment.People who get plenty of sleep-but are awakened each time they begin to dream-become anxious and restless.
This passage is mainly about（ ）.
主旨题。整个文段都在谈论梦的相关内容，梦境产生的原因、带来的好处等，D项“梦是什么”可以全面地概括到文段的每个细节，因此答案选D。A项：“睡觉时我们是如何做梦的”，片面，同样不足以概括全文；B项：“梦可以给人们带来哪些益处”，这只是原文中的一部分内容，不足以概括全文，排除；C项：“我们为什么做梦”，片面化的选项，排除；只有D项的范围大一些，“梦是什么”，可以包括梦含义、梦产生的原因以及带来的好处，故本题正确答案选B。
下列关于公司的表述，正确的是（）
以下各项列举了我国常见气象灾害与其发生地区的对应关系，其中正确的一项是（）
根据电视收视率调査，看体育节目的观众中青年人比中老年人要多。
由此可推断出（）
—种海洋蜗牛产生的毒素含有多种蛋白，把其中的一种给老鼠注射后，会使有两星期大或更小的老鼠陷入睡眠状态，而使大一点的老鼠躲藏起来。当老鼠受到突然的严重威胁时，非常小的那些老鼠的反应是呆住，而较大的那些老鼠会逃跑。
以上陈述的事实最有力地支持了以下哪项假说？（）
疾病控制中心对某校髙中三个年级的学生进行抽样做视力状况调查，抽样的方法为分层抽样（按比例抽样），若高中一、二、三年级学生人数分别为626、703、780，样本容量为84，则应从离二年级抽样的学生人数为多少？（）
