资料：For the development of Crunchy Nut （a product）,K company has used various methods of primary data collection. Primary market data may involve qualitative research or quantitative research. Qualitative data is connected more about opinions, feelings and attitudes. Quantitative data is in numerical form and is usually gathered from a large sample of respondents.
Qualitative research establishes a conversation with consumers. It prompts consumer reaction to, for example, a new product idea and helps researchers understand what they think of it, how it makes them feel, why they find it interesting or not.
Qualitative research may be obtained through focus groups, where a moderator captures feedback from a group of six or seven consumers to the ideas shown to them. Those ideas may take the format of drawings or having new food prototypes to taste. Quantitative research may use questionnaires administered to large numbers of respondents. This allows statistical analysis. It may involve the use of scales, so numbers get associated with a particular meaning-for example, on an evaluation scale of 1 to 7, where 1 means very poor and 7 means excellent. Crucially those numbers need to be interpreted to enable the business to understand the consumers' overall response.
What is the passage about?
本题考查的是主旨大意。
【关键词】passage; about
【主题句】第1自然段Primary market data may involve qualitative research or quantitative research. Qualitative data is connected more about opinions, feelings and attitudes. Quantitative data is in numerical form and is usually gathered from a large sample of respondents. 一级市场数据可能涉及定性研究或定量研究。定性数据更多地涉及意见、情感和态度。定量数据是数字形式的，通常是从大量答卷人那里收集的。
【解析】本题的问题是“本文主要是关于什么的？”。选项A意为“脆脆坚果（Crunchy Nut）的发展”；选项B意为“K公司的生产线”；选项C意为“定性数据收集”；选项D意为“两种数据收集方法”。
根据主题句可知，本文主要讲的是数据收集的两种方式——定性研究和定量研究，故选D。
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？（）
