OnThursday, scientists in Indonesia announced the discovery of a rare frog that -组卷网

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On Thursday, scientists in Indonesia announced the discovery of a rare frog that has no lungs and takes breath through its skin. Researchers believe that the little animal could provide some information about how environment can cause some animals to change so greatly over time.

The frog was found in a faraway part of Indonesia during a scientific research last summer. The unusual animal is the world’s first know lungless frog species. Only a few amphibians have been found lungless.

David Bickford is a biologist at the National University of Singapore. He led the research team that discovered the rare frog. Its living environment has been polluted by chemicals from agriculture. “These are about the most ancient and bizarre frog you can get on the earth,” he says.

Bickford says it’s possible that the frog may have changed in order to adapt to the cold, fast moving and oxygen-rich rivers in which it lives. The biologist adds that his “extreme change” was probably necessary to reduce the frog’s ability to float. That way, it could keep itself from being swept down the mountain rivers.

Scientists say that the new discovery has made it more important to protect the frog’s river living environment. In the last few years, illegal tree cutting and gold mining have caused the once-clean waters to turn brown with pollution.

“The gold mining is completely illegal and small size,” Bickford says. “But when there are thousand of them on the river, it really has a huge effect. Very soon the frog will be out of the river.”

【小题1】The frog is unusual because .

A．it has no lungs at all

B．it doesn’t use its lungs to take breath

C．it’s the world’s first lungless species

D．it can take breath either through its lungs or its skin

【小题2】What does the underlined word “bizarre” probably mean in Paragraph 3?