下面是关于SCSI(小型计算机标准接口)的叙述，其中错误的是：A．SCSI总线上连接

全面质量管理的目的是保证和提高产品质量。

甲、乙、丙、丁四位同学在探究实验时发现了个意外的现象：氢氧化钠溶液中滴入酚酞试液，溶液变成红色，可是过了一会儿红色就消失了．这是什么原因呢？他们依据所学的化学知识，分别对意外现象的成因做了如下猜想：

甲：可能是酚酞变质造成的；

乙：可能是氢氧化钠溶液与空气中的二氧化碳反应的缘故；

丙：可能是酚酞与空气中的氧气反应使红色消失；

丁：可能是氢氧化钠溶液的浓度过高引起的．

（1）甲同学刚提出自己的猜想，就遭到其余三位同学的否定，三位同学的理由是：______；

（2）丙同学认为乙同学的猜想也不正确，他的理由是

（3）四位同学讨论后认为要验证丙同学的猜想，还需作如下实验，你知道其实验目的吗？

实验步骤	设计这一步骤的目的
1．将配制的氢氧化钠溶液加热	______
2．在加热后的溶液中滴入酚酞，并在上方滴一些植物油	______

通过以上实验，四位同学观察到的现象是：溶液先变成红色，过了一会儿红色仍然消失．

（4）若丁同学的猜想正确，大家能设计实验证明吗？

实验方法	可能观察到的现象
______	______

饲料质量管理技术包括原料、配方设计、生产工艺、（）、售后技术服务质量管理五大内容。

A、实验室

B、工厂

C、车间

D、办公室

什么是销售收入比例法

A Frenchman, the psychologist Alfred Binet, published the first standardized test of human intelligence in 1905. (46)But it was an American, Lewis Terman, a psychology professor at Stanford, who thought to divide a_test taker’s "mental age," as revealed by that score, by his or her biological age to derive a number that he called "IQ". It would be hard to think of a pop-scientific coinage that has had a greater impact on the way people think about themselves and others.

(47)No country: embraced the IQ more thoroughly than the U.S., where millions of people have their IQ measured annually, many with a direct descendant of Binet’s original test, although not necessarily for the purpose Bin et intended. He developed his test as a way of identifying public school students who needed extra help in learning, and that is still one of its leading uses.

But the broader and more controversial use of IQ testing has its roots in a theory of intelligence—part science, part sociology—that developed in the late 19th century, before Binet’s work and entirely separate from it. (48)Championed first by Charles Darwin’s cousin Francis Galton, it held that intelligence was the most valuable human attribute, and that if people who had a lot of it could be identified and put in leadership positions, all of society would benefit.

Terman believed IQ tests should be used to conduct a great sorting out of the population, so that young people would be assigned on the basis of their scores to particular levels in the school system, which would lead to corresponding socioeconomic destinations in adult life. The beginning of the IQ-testing movement overlapped with the eugenics movement—hugely popular in America and Europe among the "better sort".

In 1958 a British sociologist named Michael Young coined the word "meritocracy" to denote a society that organizes itself according to IQ-test scores. Terman and many other early advocates of IQ testing had in mind the creation of an American meritocracy, though the word didn’t exist then. (49)They believed IQ tests could be the means to create, for the first time ever, a society in which advantage would go to the people who deserved it rather than to those who had been born into it.

In order to believe this, though, you have to believe that merit and a score on an IQ test are the same thing. (50)Long before IQ was invented, America prided itself on beinga country without a class system, in which people of talent and industry would rise and be rewarded. The advent of intelligence tests did not dramatically affect the degree of social mobility in the U.S.—at least not enough for any change to show up in the social-science data.

(47)No country: embraced the IQ more thoroughly than the U.S., where millions of people have their IQ measured annually, many with a direct descendant of Binet’s original test, although not necessarily for the purpose Bin et intended.