Question

【题目】 ◆ Welwitschia mirabilis

Title: the world’s most resistant plant

It’s not pretty to look at, but welwitschia mirabilis is unique. It consists of only two leaves and a strong stem with roots. Two leaves continue to grow and the stem thickens and can grow to be almost 2 meters high and 8 meters wide. Its lifespan is 400 to 1,500 years. It can survive up to five years with no rain. The plant is said to be very tasty either raw or baked in hot ashes.

◆ Dionaea muscipula

Title: the Venus Fly Trap

Dionaea muscipula is the most famous carnivorous(肉食性的) plant due to the active and efficient nature of its unique trap. It may be famous, but it’s also threatened. It produces a short leaf that forms two sides of a trap. Each side contains some sensitive hairs. When it is touched two to three times, the trap will shut in less than a second, fast enough to catch flies and other insects. The leaf, once closed, produces some enzymes(酶) that slowly dissolve the insects and supply the plant with food.

◆ Rafflesia arnoldii

Title: the world’s largest flower

Rafflesia arnoldii, the largest flower in the world, is an exotic and rare plant. The flower is 3 feet across and weighs 15-24 pounds. However, you wouldn’t want to grow it in your garden. In a rainforest-type environment, it gives off a most unpleasant smell, which is somewhat like rotten meat. This is why it is often called the Corpse Plant by some natives of Indonesia where it comes. Its flowers only last for three days to a week.

◆ Euphorbia obese

Title: the Baseball Plant

Euphorbia obese is known as the Baseball Plant. Over-harvesting by plant collectors for its interesting and curious appearance has severely reduced the wild population. However, it has become very common now. By growing euphorbia obese in large numbers, many gardens have been working to ensure that the plants being traded and sold among plant collectors are not wild plants.

【1】From the passage, we know that __________.

A.welwitschia mirabilis is very beautiful

B.dionaea muscipula is famous for its trap

C.rafflesia arnoldii feels like rotten meat

D.euphorbia obese can be used as baseball

【2】According to the passage, rafflesia arnoldii __________.

A.shuts its trap two or three times in one second.

B.gives off a special smell to attract flies and insects

C.smells bad in a hot and wet environment

D.has a big flower, a strong stem and two leaves

【3】Plant collectors like euphorbia obese because __________.

A.it looks strange

B.it tastes delicious

C.it can be planted in the garden

D.it is worth a big fortune

Answer 1

【答案】

【1】B

【2】C

【3】A

【解析】

本文是说明文。介绍了世界上几种比较独特的植物。

【1】细节理解题。根据第二部分Dionaea muscipula中的Dionaea muscipula is the most famous carnivorous(肉食性的) plant due to the active and efficient nature of its unique trap. It may be famous, but it’s also threatened.和When it is touched two to three times, the trap will shut in less than a second, fast enough to catch flies and other insects.可知捕蝇草是最著名的肉食植物，由于其活跃高效的特性和其独特的陷阱出名。当苍蝇和其他昆虫接触两三次后，捕蝇草的陷阱就会快速关闭将其逮住。故选B。

【2】细节理解题。根据第三部分Rafflesia arnoldii中In a rainforest-type environment, it gives off a most unpleasant smell, which is somewhat like rotten meat.可知Rafflesia arnoldii在雨林类型湿热的环境中，它会发出一种非常难闻的像腐肉的气味。故选C。

【3】细节理解题。根据最后一部分Euphorbia obese中Over-harvesting by plant collectors for its interesting and curious appearance has severely reduced the wild population.可知植物采集者因其有趣和好奇的外表而喜欢Euphorbia obese，故选A。