When 18th-century scientists first came across Australia’s platypus(鸭嘴兽), they thought it was a trick. It is not surprising that the platypus made people confused. This funny-looking animal has feet and is a kind of warm-blooded mammal.
While other mammals usually keep their blood at around 37 degrees, the platypus has a lower body temperature of 32 degrees. As to its appearance, the platypus’mouth is not really like ducks’at all; its mouth actually looks a bit soft. The platypus closes its eyes when swimming. It uses its mouth to pick up outside information made by the creatures underwater.
Strangest of all, the platypus is a mammal that can lay eggs. And there is only one other kind of mammal that can lay eggs, the echidna (针鼹鼠) of Australia. Both the platy-pus and the echidna lay soft-shelled eggs, and both feed their young with their own milk that comes out of their skin. These animals also walk in a way that is similar to crocodiles(鳄鱼), with legs on the sides of their bodies rather than under them.
Though pretty, in a special way, the platypus is actually one of the few mammals that are poisonous. A male platypus has knife-like bones on its back legs which have enough poison to kill a dog.
The platypus has the honor of being one of the oldest mammals in the world. Until the early 20th century, it was hunted for its fur, but the situation has changed. Although the platypus is easily affected by pollution, it is not under any immediate threat.
小题1: What can we learn about the platypus according to the text?
A．It has a lower body temperature than other mammals.
B．It only closes its eyes when underwater.
C．It’s the only poisonous mammal in the world.
D．It feeds its young on wild animal meat.小题2:Which of the following is NOT used as a comparison with the platypus in the text?
A．The crocodile.
B．The echidna.
C．The duck.
D．The dog.小题3:The following characteristics of the platypus have been described in the text EXCEPT ________.
A．its natural enemy
B．its appearance
C．its walking pose
D．its daily diet小题4:We can infer from the last paragraph that the platypus _______.
A．is hunted for its meat
B．is in danger of extinction
C．is endangered by air pollution
D．is well-protected now小题5:Which of the following would be the best title for this text?
A．Platypus, a Trick?
B．Platypus, the Only Warm-Blooded Mammal
C．The Characteristics of Platypus
D．The Strange Mammal —Platypus。
小题1:A
小题2:D
小题3:A
小题4:D
小题5:D
题目分析：这篇介绍了世界上最古老的哺乳动物鸭嘴兽的外貌，饮食和走路姿势等等信息，也介绍了鸭嘴兽现在正在受到保护。
小题1:细节题：从文章第二段的句子：While other mammals usually keep their blood at around 37 degrees, the platypus has a lower body temperature of 32 degrees.可知鸭嘴兽的体温比正常的哺乳动物要低，选A
小题2:细节题：从文章第二段的句子：As to its appearance, the platypus’mouth is not really like ducks’at all;可知是将鸭嘴兽和鸭子对比，从文章第三段的句子：可知将鸭嘴兽和鳄鱼和鼹鼠对比，倒数第二段的句子：A male platypus has knife-like bones on its back legs which have enough poison to kill a dog.提到狗，但是并不是和狗做对比。选D
小题3:细节题：从文章第二段的句子：As to its appearance, the platypus’mouth is not really like ducks’at all;可知介绍了鸭嘴兽的外貌，从文章第三段的句子：and both feed their young with their own milk that comes out of their skin. These animals also walk in a way that is similar to crocodiles(鳄鱼), with legs on the sides of their bodies rather than under them.可知提到鸭嘴兽的饮食和走路姿势，没有提到鸭嘴兽的天敌，选A。
小题4:推理题：从最后一段的句子：Until the early 20th century, it was hunted for its fur, but the situation has changed. Although the platypus is easily affected by pollution, it is not under any immediate threat.可以推断出鸭嘴兽现在被保护的很好，选D
小题5:标题确定题：这篇介绍了世界上最古老的哺乳动物鸭嘴兽的外貌，饮食和走路姿势，从第一段的句子：It is not surprising that the platypus made people confused. This funny-looking animal has feet and is a kind of warm-blooded mammal.可知 D是最好的标题。