问题 实验题

下图是桃的花和果实示意图,据图回答问题。

写出图中字母代表的名称:

A            B             C             D         

答案

胚珠           种子       子房       果皮

题目分析:图中A是胚珠、B是种子、C是子房壁、D是果皮,植物在传粉和受精作用后,花萼、花冠、雄蕊以及雌蕊的柱头和花柱一般都逐渐凋落,雌蕊的子房却慢慢膨大起来,在果实的发育过程中,由于细胞不断分化、分裂和生长,子房逐渐膨大,其中C子房壁发育成D果皮,子房中的A胚珠发育成B种子,胚珠里面的受精卵发育成胚,最终雌蕊的子房发育成果实。

点评:此题考查花的结构、果实和种子的形成,熟练掌握果实和种子的形成过程,便可轻松解题。

阅读理解

阅读理解

Speak, speak, speak!

     Practise speaking as often as you can. Speaking to yourself is good practice.

Try recording yourself whenever you can.

     Compare your pronunciation with the master version(原版)to see how you can do better and have

another go. If you do this several times, you will find that each time is better than last.

Why not learn with someone else?

     It helps if you can learn with someone else. If you can persuade a friend or family member to study

with you, it will make you keep working.

Don't get stuck by a word you don't know.

     Practise improving ways of getting your meaning across when speaking spontaneously(本能地),even

if you don't know the exact words or phrases. Think of things you might want to say whenever you have

spare time. Use facial expressions, hand movements, anything to make yourself understood.

Language learning is also about intuition(直觉).

     Guesswork is an important way to learn a new language. When listening to recorded material, you aren't expected to understand everything first time round. If you play the same piece several times, you will

most probably understand something new each time.

Build up your vocabulary.

     A wide vocabulary is the key to successful language learning but don't try to learn too much at once.

It's best to study frequently, for short periods of time. Take at most six or seven items of vocabulary and

learn them. Put them into sentences to fix them in your mind, and then come back to them later.

And above all, have fun!

1. What's the purpose of this passage?

A. To tell us the importance of practicing speaking as often as we can.

B. To tell us a few tips to help us learn a new language well.

C. To tell us that guesswork is an important way to learn a new language.

D. To tell us that a wide vocabulary is the key to successful language learning.

2. What's the meaning of the underlined phrase in the first part?

A. Have another try or attempt.        

B. Move away from a place to another.

C. Enter a certain state or condition.    

D. Follow or take a certain course.

3. To learn English well, we shouldn't _______ according to the passage.

A. practice speaking as often as possible

B. study frequently, for short periods of time to build up our vocabulary

C. try to understand everything and stop when we meet a new word

D. try to persuade a friend or family member to study with us

4. According to the passage, to learn a new language well, the most important thing is ______.

A. speaking as much as possible          

B. having fun

C. a wide vocabulary                    

D. guesswork

单项选择题