问题 选择题

下列有关说法中错误的是(  )

A.工业生产中的合成材料主要有:合成橡胶、合成纤维、塑料

B.农业生产中主要的化学肥料有:氮肥、磷肥、钾肥

C.日常生活中常给织物去污的方法有:酒精除圆珠笔油、食盐除水果汁、草酸除铁锈

D.人体主要的供能营养物质有:蛋白质、油酯、维生素

答案

A、合成材料又称人造材料,是人为地把不同物质经化学方法或聚合作用加工而成的材料,所以工业生产中的合成材料主要有:合成橡胶、合成纤维、塑料,故A正确;

B、氮、磷、钾是植物所需要的营养元素且土壤和水中又不能提供,需要人们施加,农业生产中主要的化学肥料有:氮肥、磷肥、钾肥,故B正确;

C、酒精能溶解圆珠笔油、食盐能吸收水果汁、草酸能和铁锈反应,所以它们能给织物去污,故C正确;

D、人类需要的营养物质有糖类、油脂、蛋白质、维生素、水和无机盐,故D错误.

故选:D.

单项选择题
单项选择题

It’s easy to get the sense these days that you’ve stumbled into a party with some powerful drug that dramatically alters identity. The faces are familiar, but the words coming out of them aren’t. Something has happened to a lot of people you used to think you knew. They’ve changed into something like their own opposite.

There’s Bill Gates, who these days is spending less time earning money than giving it away--and pulling other billionaires into the deep end of global philanthropy(慈善事业) with him. There’s historian Francis Fukuyama, leading a whole gang of disaffected fellow travelers away from neoconservatism. To flip-flopis human. It can still sometimes be a political liability, evidence of a flaky disposition or rank opportunism. But there are circumstances in which not to reverse course seems almost pathological(病态的). He’s a model of consistency, Stephen Colbert said last year of George W. Bush:" He believes the same thing Wednesday that he believed on Monday -- no matter what happened on Tuesday."

Over the past three years, I found people who had pulled a big U-turn in their lives. Often the insight came in a forehead-smiting moment in the middle of the night: I’ve got it all wrong.

It looked at first like a sprinkling of outliers beyond the curve of normal human experience. But when you stepped back, a pattern emerged. What these personal turns had in common was the apprehension that we’re all connected. Everything leans on something, is both dependent and depended on.

"The difference between you and me," a visiting Chinese student told University of Michigan psychologist Richard Nisbett not long ago," is that I think the world is a circle, and you think it’s a line." The remark prompted the professor to write a book, The Geography of Thought, about the differences between the Western and the Asian mind.

To Western thinking, the world is linear; you can chop it up and analyze it, and we can all work on our little part of the project independently until it’s solved. The classically Eastern mind, according to Nisbett, sees things differently: the world isn’t a length of rope but a vast, closed chain, incomprehensibly complex and ever changing. When you look at life from this second perspective, some unlikely connections reveal themselves.

I realized this was what almost all the U-turns had in common: people had swung around to face East. They had stopped thinking in a line and started thinking in a circle. Morality was looking less like a set of rules and more like a story, one in which they were part of an ensemble cast, no longer the star.

In the author’s opinion, the major cause of many people to make U-turns is that()

A. they have eaten some drug which can change their identities

B. they become to consider the connections between different things

C. they want to succeed in catching some political opportunities

D. they have been stimulated by some big changes in their life experiences