问题 选择题

土壤颗粒在风或水外力作用下从地面被移除的现象称为“土壤侵蚀”。据此回答6-8题。

6.下列因素中与土壤侵蚀的程度最不确定的是

A.土壤本身的特征                     B.外力作用的方式和大小

C.人为活动                           D.降水历时长短

7.长期而言,在具有相似的地质及地形条件且未经人为干扰的状况下,下列哪种气候类型所产生的年平均土壤侵蚀量最大

A.热带雨林气候    B.热带季风气候     C.温带海洋气候      D.地中海气候

8.我国西北地区土壤侵蚀量较大的原因,与自然和人文条件最直接相关的是

①气候长期干旱缺失  ②长期灌溉土壤盐碱化  ③开辟农田灌溉渠道  ④发展高耗能和耗水工业  ⑤扩大牲畜放牧范围

A.①②③       B.②③④        C.①⑤         D.①④⑤

答案

6.D  7.A    8.C

单项选择题

So long as teachers fail to distinguish(differ) between teaching and learning, they will continue to undertake to do for children that which only children can do for themselves. Teaching children to read is not passing reading on to them. It is certainly not endless hours spent in activities about reading. Douglas insists that "reading cannot be taught directly and schools should stop trying to do the impossible".

Teaching and learning are two entirely different processes. They differ in kind and function. The function of teaching is to create the conditions and the climate that will make it possible for children to plan cleverly the most efficient system for teaching themselves to read. Teaching is also a public activity. It can be seen and observed.

Learning to read involves all that each individual does to understand the world of printed language. Almost all of it is private, for learning is an occupation of the mind, and that process is not open to public scrutiny.

If teacher and learner roles are not interchangeable, what then can be done through teaching that will aid the child in the long search for knowledge Smith has one principle rule for all teaching instructions. "Make learning to read easy, which means making reading a meaningful, enjoyable and frequent experience for children. "

When the roles of teacher and learner are seen for what they are, and when both teacher and learner fulfill them properly, then much of the pressure and feeling of failure for both is got rid of. Learning to read is made easier when teachers create an environment where children are given the chance to solve the problem of learning to read by learning.

The problem with the reading course as mentioned in the first paragraph is that ().

A. too much time is spent in teaching about reading

B. reading tasks are given with little guidance

C. it is one of the most difficult school courses

D. students spend limited hours in reading

单项选择题