题干

下列有关蛋白质的说法错误的是(     )

A:蛋白质不需要消化就能被人体吸收和利用

B:蛋白质是以氨基酸为基本单位缩合成的生物大分子

C:生物界的蛋白质种类非常多

D:蛋白质参与组成细胞和生物体的各种结构,执行多种多样的功能

上一题 下一题 0.0难度 选择题 更新时间:2014-12-05 07:18:45

答案(点此获取答案解析)

A

同类题1

阅读理解

    Have you ever noticed what happens to an idea once you express it? Just talking about it or writing it down causes you to make it clear in your own mind. How can you use this to increase your brain power? Start writing.

    By putting thoughts into words, you are telling yourself the logic(逻辑)behind what you think, feel, or only partly understand. Often, explaining a thought is the process of understanding. In other words, you increase your brain power by exercising your “explain power.”

    Try this experiment. Explain how you'll increase your brain power, even if you have no idea right now. Just start with anything, and create an explanation. For example, start with “I'll learn chess,” or “I'll read an article on the mind every week.” Explain how that will help. You'll be surprised how often this becomes a workable plan, and if you actually do this, you'll have a better understanding of your brain from now.

    Another benefit of writing is that it helps you remember. Many, if not most, highly productive people are always taking notes. You can try keeping it all in your head, but if you keep a journal of your ideas the next time you're working on a big project, you'll probably have more success.

    Want to understand a topic? Write a book about it. That's an extreme example, but if you are learning something new, write a letter to a friend about it, and you will understand it better. Want to invent something? Write an explanation of the problem, why you want to solve it, and why it is worth solving, and you're half-way there.

    Writers don't always write because they clearly understand something beforehand. Often, they write about something because they want to understand it. You can do the same. Writing will help bring you to an understanding. Give it a try.

同类题5

信息归纳:阅读下文,根据所提供的信息,完成下列表格。

Stop Phubbing (别当低头族)

     Last month, Justin Valdez, a college student was shot in subway in San Francisco, the U.S. The surveillance(监控) video showed that before Justin was killed, the killer pulled out the gun several times, and even wiped his nose with it. However, nobody noticed the killer. The surrounding passengers all focused on their mobile phones.

     We may see the same scene everywhere in the life: in subway, restaurants. Elevators, roads, people are watching their mobile phones. From family reunion to date with a friend, people can't stop checking their WeChat, Facebook on the mobile phone and snubbing(无视) the persons in front completely. Not only the young people, but also the olds and the kids.

     “Phubbing” is a new word which comes from the words “phone” and “snub”. It means the habit of snubbing someone in favor of(只顾着) a mobile phone. The word “phubbing” was included in the Australian National Dictionary in 2012. So we can see phubbing is spreading globlly.

     Phubbing seems innocuous(无害的); however, it disturbs our life. Stop posting photos. Let's put down the mobile phone and enjoy the real taste of food and the warmth of interpersonal(人与人之间) communication.

Information Card

The place where Justin Valdez comes from

____

The things that the passengers focused on when Justin Valdez was shot

____

The meaning of phubbing

____

The time when the word “phubbing” was included in the Australian National Dictionary

____

The reason why the writer asks us to stop posting photos

____