题干

细胞核内行使遗传功能的结构是   

A:核膜  

B:核孔  

C:染色质 

D:核仁

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答案(点此获取答案解析)

C

同类题2

阅读理解

    So long as teachers fail to distinguish between teaching and learning, they will continue to undertake to do for what 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 devise 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 not make sense of 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 will aid the child in knowledge. Smith has one principal 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 appropriately, then much of the pressure and feeling of failure for both is eliminated. Learning to read is made easier when teachers create an environment where children are given the opportunity to solve the problem of learning to read by reading.

同类题5

阅读下面的文字,回答题目。
     【甲】山不在高,有仙则名;水不在深,有龙则灵。斯是陋室,惟吾德馨。苔痕上阶绿,草色人帘青。谈笑有鸿儒,往来无白丁。可以调素琴,阅金经。无丝竹之乱耳,无案牍之劳形。南阳诸葛庐,西蜀子云亭。孔子云:何陋之有?
                                                                                                                    (刘禹锡《陋室铭》)
     【乙】震孤贫好学,明欧阳《尚书》,通达博览,诸儒为之语曰:“关西孔子杨伯起。”教授二十余年,不答州郡礼命,众人谓之晚暮,而震志欲笃。骘闻而辟之,时震年已五十余,累迁荆州刺史、东莱太守。当之郡,道经昌邑,故所举荆州茂才王密为昌邑令,夜怀金十斤以遗震。震曰:“故人知君,君不知故人,何也?”密曰:“暮夜无知者。”震曰:“天知,地知,我知,子知,何谓无知者!”密愧而出。
                                                                                                                    (节选自《资治通鉴》卷四九)
      ①震:杨震,字伯起。②欧阳《尚书》:指欧阳和伯创立的《今文尚书》。③关西:指潼关以西的地区。④州郡礼命:州郡的聘请任命。⑤晚暮:意思是年纪老了。⑥骘:即邓骘,时任大将军。⑦辟:征召。⑧昌邑:汉代县名。⑨茂才:即秀才。⑩故人:对门生、故吏的自称。