问题 选择题

下面对于生物的描述中,错误的是(  )

A.几乎所有的生物都是由细胞构成的

B.一切生物都具有繁殖的能力

C.运动是区分生物和非生物的最主要特征之一

D.应激性是生物具有的普遍特性

答案

A、除病毒以外,生物都是由细胞构成的.病毒是由蛋白质外壳和遗传物质(核酸)组成,是没有细胞结构的生物.符合题意

B、成熟的生物个体能够通过生殖产生后代.不符合题意

C、动物是生物的一个主要类群,称为动物界.它们能够对环境作出反应并移动,捕食其他生物.动物区别于其他生物的重要特征就是自由运动.

不符合题意

D、具有生物的特征有应激性.如用手轻轻触动含羞草的叶,叶会合拢,向日葵的花盘朝向太阳,植物根的向地性,向水性,向肥性,茎的背地生长等,都说明植物具有应激性.不符合题意

故选:A

单项选择题 A1/A2型题
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