Question

Without flowers, many plants would not be able to reproduce (繁殖) and many insects would not be able to get enough food to live. Here are some interesting facts about flowers plants.

● Most plants grow flowers each year, but some take much longer. The century plant (龙舌兰) grows only one flower and then it dies! Even more amazing is a plant from South America called Puya raimondii. It doesn’t grow a flower until it is 150 years old, and after that it dies, too.

● The smallest flowering plant in the world is thought to be the common watermeal (无根萍). Its leaves are only 1mm across!

● Bamboo has amazing flowering habits. There are many different kinds of bamboo in the world. And they have different flowering habits. A few flower each year, but most wait much longer. What is amazing is that all bamboo of the same kind will flower almost at the same time, where it is 6 growing! Nobody knows why.

● The white flower of the Amazon water lily (睡莲)is the size of a football, and the flower turns purple after it has been pollinated (授粉).

● The Caucasian lime can grow in Britain. Its flowers are poisonous to bees. If they touch the flowers, they will die.

1.Which of the following plants needs the longest time to grow flowers?

A. The bamboo. B. The watermeal.

C. The Puya raimondii. D. The Caucasian lime.

2.From the fourth paragraph we know that ________.

A. bamboo is the most amazing plant in the world

B. all kinds of bamboo grow beautiful flowers every year

C. the flowers of a bamboo is as large as the size of a football

D. the same kind of bamboo will grow flowers at the same time

3.The Amazon water lily’s white flowers can ________.

A. change color B. grow long

C. kill bees D. attract insects

4.The underlined word “poisonous” in the last paragraph means “________” in Chinese.

A. 有香味的 B. 有毒的

C. 有吸引力的 D. 有营养的

5.Which of the following is TRUE according to the passage?

A. Many insects get their food from flowers.

B. After growing a flower, the century plant will grow better.

C. The common watermeal has the smallest leaves in the world.

D. Bees will die if they touch the leaves of the Caucasian lime.

 

Answer 1

1.C

2.D

3.A

4.B

5.A

【解析】

试题分析：没有花，许多植物将不能繁殖，而且许多昆虫将不能获得足够的食物来生活。文章介绍了几种花，如龙舌兰、无根萍、睡莲等。

1.细节理解题。文章第二段介绍了需要较长时间才能开花的植物，其中提到了Puya raimondii，所以选C。其它三项所列植物开花需要的最长时间均未提及。

2.细节理解题。由第四段中“... all bamboos of the same kind will flower at exactly the same time, wherever they are growing”可知选D。

3.细节理解题。由第五段“The white flower of the Amazon water lily is the size of a football, and the flower turns purple ...”可知the Amazon water lily可以从白色变成紫色，所以选A。

4.猜测词义题。第六段“If they touch the flowers, they will die”中的they指代的是bees，the flowers指代的是the Caucasian lime的花。蜜蜂碰到the Caucasian lime的花就会死，说明the Caucasian lime的花有毒，所以选B。

5.推理判断题。由第一段“... many insects would not be able to get enough food to liv”可知许多昆虫是以花朵为食的，所以A项表述正确。由第二段中“The century plant grows only one flower after many years and then it dies可知the century plant”开花后就会死亡，所以B项表述不正确。由第三段中“The smallest flowering plant ... Its leaves are only 1mm across”推不出the common watermeal的叶子是世界上最小的，所以C项表述不正确；由最后一段的最后一句可知，蜜蜂碰到the Caucasian lime的花会死，并不是the Caucasian lime的叶子，所以D项表述不正确。

考点:科学类阅读。