问题 判断题

除病毒外的绝大多数生物都是由细胞构成的。细胞是生命活动的基本单位。 (   )

答案

分析:1)一切有机体都由细胞构成,细胞是构成有机体的基本单位(病毒除外).

2)细胞是代谢与功能的基本单位.

3)细胞是有机体生长与发育的基础.

4)细胞是遗传的基本单位,具有遗传全能性.

5)没有细胞就没有完整的生命

6)病毒没有细胞结构但是能靠自身的遗传物质中的遗传信息,利用寄主细胞内的物质,制造出新病毒.这就是它的繁殖,所以病毒也是生物.

答:病毒是生物,没有细胞结构.因此除病毒外的绝大多数生物都是由细胞构成的.细胞是生命活动的基本单位

故答案为:√.

点评:本题主要考查了对细胞概念及意义的理解和病毒的特征.

单项选择题

People are indulging in an illusion whenever they find themselves explaining at a cocktail (鸡尾酒) party, say, that they are "in computers," or "in telecommunications," or "in electronic funds transfer". The implication is that they are part of the high-tech world. Just between US, they usually aren’t. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are (71) of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working groups(紧密联系在一起的工作小组), we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort, and our failures stem from poor human interactions.

The main reason we tend to focus on the (72) rather than the human side of the work is not because it’s more (73) , but because it’s easier to do. Getting the new disk drive installed is positively trivial compared to figuring out why Horace is in a blue funk (恐惧) or why Susan is dissatisfied with the company after only a few months. Human interactions are complicated and never very crisp (干脆的, 干净利落的) and clean in their effects, but they matter more than any other aspect of the work.

If you find yourself concentrating on the (74) rather than the (75) , you’re like the vaudeville character (杂耍人物) who loses his keys on a dark street and looks for them on the adjacent street because, as he explains, "The light is better there!".

(74)处应填()。

A.technology

B.sociology

C.physiology

D.astronomy

判断题