Scientists have discovered a tiny chameleon(变色龙)from Madagascar that may be the world's smallest reptile(爬行动物).The chameleon is small enough to easily sit on a fingertip.The tiny animals are being called "nano-chameleons"(very small chameleons),and are officially known as Brookesia nana,or B.nana.Only two have ever been spotted—one male and one female.
Reptiles are egg-laying animals with backbones,and include animals like snakes,lizards,and crocodiles.Reptiles are cold-blooded,which means their bodies have the same temperature as the area around them.
The female example of B.nana was about 2.9 centimeters(1.14 inches)long.But the male B.nana that the scientists found was much tinier—2.2 centimeters(0.87 inches)from head to tail.This is unusual for chameleons.Usually the male is larger.But the scientists believe that B.nana is so small that the female may need to be larger in order to carry eggs.
Unlike some other chameleons,B.nana doesn't have the ability to change its colors greatly.But the skin of the B.nana is a mixture of brown colors which blends(融合)in well with the leaves and grasses on the forest floor where they live.The chameleons have a long tongue which can stick out quickly to grab small insects for food.But B.nana needs to be wary.Since it's so small.jye.ai could easily become food for a larger insect or spider.
The scientists are also worried that the tiny chameleons could face other threats.Luckily,since B.nana was first spotted in 2012,the mountain area where it was found has been protected by the government.In other efforts to protect B.nana,it may soon be listed as critically endangered with extinction. "It's all good and well to say, 'Oh,I really hope that people stop deforesting this forest,'" says Scherz,an evolutionary biologist. "But until the economic future of Madagascar changes,there's no hope for any of its wildlife because the people have to eat."
(1)What is the reason for the female B.nana being larger than the male one according to scientists? DD
A.Taking care of her children.
B.Showing her strength.
C.Defending against enemies.
D.Carrying eggs.
(2)What can we know about nano-chameleons? CC
A.Their blood is very cold.
B.Scientists have only found one.
C.They are not good at changing colors.
D.They are as small as a fingertip.
(3)Which of the following has the closest meaning with the underlined word "wary" in paragraph 4? AA
A.Careful.
B.Helpful.
C.Hopeful.
D.Useful.
(4)What does Scherz say about wildlife protection of Madagascar? BB
A.There is little hope that tiny chameleons survive.
B.To achieve it the economic change is vital.
C.Measures must be taken to prohibit deforestation.
D.It's unnecessary to talk about it.
【考点】说明文.
【答案】D;C;A;B
【解答】
【点评】
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发布:2024/4/20 14:35:0组卷:1引用:1难度:0.5
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