Most dictionaries will tell you a number of things about a language. There are three important things. These three things are spelling, pronunciation(发音) and meaning.

    First, a dictionary will tell you the spelling of a word. If you are not sure about the spelling of a word, you can try to find the correct spelling in a dictionary. Words are listed in an alphabetical (字母表的) order —— a, b, c and so on. For example, on a dictionary page the "poor" comes before "poverty" and the word "poverty" comes before the "power".

    The words are always given in alphabetical order. The second thing, a dictionary will tell you the pronunciation. Most dictionaries give phonetic, or sound alphabet. The phonetic alphabet (音标) shows pronunciation. The third thing, a dictionary will tell you the meaning of words. You can look up a word and find out what it means. Many words have more than one meaning, and a good dictionary will tell you all of the word's meanings. For example, in English the common word "get" has over 20 different meanings.

下列关于实验过程的叙述，正确的一组是（    ）
①解离的目的是用药液使组织细胞相互分离
②漂洗的目的是洗去根尖上的盐酸，以利于染色时碱性染料着色 
③用龙胆紫染液可将细胞核中的染色质染成紫色
④压片的目的是使根尖细胞充分分散，形成单层
⑤当看到一个处于中期的细胞时，注意观察它如何进入后期、末期，以理解从中期到末期的变化

选词填空。

睁眼看世界，寻求革新救国思想。魏源在如图所示著作中提出的思想主张是（    ）

阅读下面的文言文，完成问题。

    某山隅有一老圃，早失偶，惟一女远适他乡。猎者怜其孤，赠以猴。老者爱如赤子，每出必从，不链不掣，而不离不逸。如是者五年。一日，老者暴卒猴掩门奔其姐泪如雨。曰：“父死乎？”颔之，乃俱归。老者家徒壁立，无以为养，猴遍哭于乡，乡人乃资而掩。姐引之去，猴揖谢之，仍牢守故宅，撷果自食。每逢五必哭祭，似念老父养之五年，哀伤殊甚。未三月而偃卧坟间。乡人怜之，乃葬于老者之侧，勒石其上，曰：“义猴之墓”。