案例1 某涂料厂生产丙烯酸系列内、外墙涂料,质检科长说他们的产 品分别执行国家关于内、外墙涂料的两份通用标准。但是该厂涂料 有十多个品种,其产品说明书声称各种指标参数分别高干国家标准 的规定,并且价格也高低相差十余倍。 该厂提供了每年按国家标准规定做的型式试验报告,但没有说 明是送哪个品种去做的型式试验,报告仅记录了按国标要求各项参 数结论为“合格”,但没有提供高于国家标准要求的试验证据

Please print out this problem set and record your answers on the printed copy. Answers to this problem set are to be turned in at the box outside by 4: 10 Wednesday, October I Problem sets will not be accepted late Solutions will be posted on the web October 2

Bob, a student taking 7.012, looks at a long-standing puddle outside his dorm window Curious as to what was growing in the cloudy water, he takes a sample to his TA, Brad Student. He wanted to know whether the organisms in the sample were prokaryotic or eukaryotic

Many intracellular proteins are required to interact or bind to other macromolecules within a bind DNA. Such proteins often have conserved structural features, called motifs, whis at can cell in order to function properly. One class of such proteins is comprised of proteins tha interact with DNA. One such motif consists of two closely aligned a-helices(shown as cylinders below)that each have leucine-rich regions. This motif is referred to as a leucine

爬行纲的主要特征，代表性动物，爬行纲的分类，爬行动物与人类的关系及保护

动物从水生向陆生的过渡，两栖纲的主要特征，代表性动物，两栖纲的分类，两栖动物面临的威胁

第一节 心理发展理论概述 第二节 心理发展的基本问题 第三节 心理发展的基本规律 第一节 认知理论概述 第二节 意识和注意 第三节 感觉和知觉 第四节 记忆 第五节 思维

棘皮动物门的主要特征，代表性动物及其特征，棘皮动物门的分类，检索表及其编写。 脊椎动物与无脊椎动物的主要区别，脊索动物门的主要特征，尾索动物的特征及代表性动物，头索动物的特征及代表性动物，脊索动物门的分类 圆口纲的主要特征，代表性动物，圆口纲的分类

Please print out this problem set and record your answers on the printed copy. Answers to this problem set are to be turned in at the box outside by 4: 10 Wednesday, September 17. Problem sets will not be accepted late. Solutions will be posted on the web

环节动物门的基本特征，代表性动物，分类，与人类的关系 软体动物门的基本特征，代表性动物，分类，与人类的关系