题干

下列关于细胞中的有机物的叙述正确的是(    )

A:细胞中包括蛋白质、核酸在内的有机物都能为细胞的生命活动提供能量

B:蛋白质是生命活动的主要承担者

C:核酸是一切生物的遗传物质,仅存在于细胞核中

D:脂质中的胆固醇是对生物体有害的物质

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B

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    The rules about how to talk, eat and sit, which are highly limited, are observed in most Western restaurants and homes. ____ Many Westerners have no idea how to act at the Chinese dinner table. No forks or knives for them to use! The Chinese host makes great, sweeping arm movements that go over large sections of the table, passing over both food and friends alike. ____ However, it leaves many foreigners at a loss for what to do.

    In my childhood home, dinner was enjoyed with low voices, and the topics that we could discuss were very limited. ____ If I had to leave the table to use the toilet, I had to excuse myself without mentioning what it was that I was going to do. “May I be excused, please? I need to wash my hands.” I would say. My mother would say, “Sure.” My father would often play a joke on me by saying, “____”

    As for eating, we did it quietly. No eating noises were allowed. Everything must be done as quietly as possible. If any sound was created by eating food or drinking, it would be considered as bad manners!

    ____He is to sit up straight with the recessive hand (usually the left) in one's lap holding a napkin while the dominant hand (usually the right) holds the fork or spoon. The only time one is allowed to have both hands on the table is when he is using a knife to cut something.

A. The scene is fantastic.

B. Your hands don't look dirty!

C. How one sits at the table is also prescribed.

D. Can't you think up a better excuse than that?

E. In general they were all strictly forbidden topics.

F. They're completely different from what we find here in China.

G. We were not allowed to talk about anything that made listeners uncomfortable.