Golden Poisonous Frogs

　　The golden poison frog might be the most-deadly of the South American animals,which is protected by means of poison.This very small frog,less than 55 mm in length,packs enough punch(效力)to take down a pair of African bull elephants.This apparently harmless frog has always been known to have killed people who have touched it directly.It’s also been noted that chicken and dogs have died by contacting things on which a golden poison frog had wandered! In intense colors,they normally look attractive to their targets.

　　1.What can we learn about piranhas from the passage?

　　A.Piranhas are the most dangerous animals.

　　B.Piranhas like to live in the deep seabed.

　　C.Piranhas may attack human beings when the water level is low.

　　D.Piranhas only attack human beings when they cross the river in groups.

　　2.How does an anaconda kill its victim according to the passage?

　　A.It often uses its poison to kill its victim.

　　B.It often uses its strength to kill its victim.

　　C.It kills its victim mainly using its powerful teeth.

　　D.It kills its victim with the help of other snakes.

　　3.The underlined word “camouflage” in Paragraph 3 means “　”. 

　　A.hide itself by appearing like the surroundings

　　B.terrify and capture the enemy by making much noise

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