下列有关发达国家和发展中国家的叙述，正确的是[ ] A．发达国家经济发展水平较高

阅读下面短文，根据上下文填入适当的词语，或使用括号中的词语的适当形式填空。

On keeping a Diary in English

Keeping a diary in English is one of the 小题1:___  __ (effect) ways to improve our English writing ability.

小题2:______ (compare) with other forms of writing, it is shorter and takes 小题3:______ time. It can help us to develop the habit of thinking in English. 小题4:______ we persist in this practice, gradually we’ll learn how to express ourselves in English. In keeping a diary in English, we certainly run up against many 小题5:____ __（difficult）. In the first place, 小题6:______ often happens that we have trouble 小题7:_________(find) appropriate words and phrases to give expression to our mind. Secondly, there are many idiomatic ways of saying things in Chinese. And it is extremely hard for us to put them into English properly.

As far as I 小题8:____ __ (concern), my suggestion is that we should always have a notebook and a Chinese-English dictionary within easy reach. Whenever something beats us, we can first put it down in our notebook and then consult our dictionary. We can also turn to our English teacher for help, if necessary. In short, I believe that it is 小题9:______ great use to keep a diary in English for 小题10:______ development of our writing skills.

和谐社会是对某种以人为本的彼此合作宽容而没有冲突的社会形态的溢美称谓，也是人类社会一直竞逐不息的理想追求。据此回答下列问题：

（1）下右图的人物为建设理想社会提出了什么主张？这些主张对当时社会关系的认识有何明显缺陷？

（2）民生问题是社会和诣的核心。中国民主革命的先行者孙中山为解决民生问题提出了怎样的主张？其主张未能实现的根本原因是什么？

（3）与古代先哲和孙中山相比，邓 * * 在南方谈话中提出的解决民生问题的主张有何显著不同？谈谈你对这种不同的认识。

企业经营计划的主要任务是什么？

正常脑脊液内白细胞计数应在（）

A.（0～6）×10⁶／L

B.（0～15）×10⁶／L

C.（0～20）×10⁶／L

D.（0～8）×10⁶／L

E.（0～25）×10⁶／L

由于测量仪器使用不当，测量方法不够科学等因素所造成的测量误差称为（）误差。

A.随机

B.系统

C.相对

D.疏失