A research paper recently reported that the Chinese paddlefish （中華鱘）—one of the world's largest freshwater fish—has been declared extinct.
Scientists say the Chinese paddlefish and its close relatives have been around for at least 200 million years.The species，reaching up to seven meters in length，survived unimaginable changes，such as the mass extinction that killed the dinosaurs.But there's one phenomenon this ancient species，sometimes called the "panda of the Yangtze"，could not survive humans.
Their huge size and plentiful flesh made them a popular target for fishermen and a welcome addition to inner tables in Chjye.aia.In the 1970s，25 tons of paddlefish were harvested per year on average.
But the construction of the Gezhouba Dam on the Yangtze forever changed the Yangtze River habitat of paddlefish，because it was constructed without a fish ladder or sideway and cut off the paddlefish from their only breeding （繁殖） grounds upstream.Populations of the fish continued to decrease after the completion of the dam in 1981，but nobody had yet figured out how terrible the situation wjye.ai.As is often the case，there can be a significant delay between major disturbances and their consequence.The researchers say the fish had become functionally extinct by 1993，meaning there were not enough fish to meaningfully reproduce.
Ms Pan is an ocean expert with Greenpeace East Asia.She told The Associated Press the extinction of the Chinese paddlefish was "a huge loss" for nature.She said the development confirms that the Yangtze River is experiencing major environmental damage.
"The ecosystem of the Yangtze River is close to its breaking point due to human activity in past decades，" Pan said."The paddlefish's extinction should serve as a wake-up call to protect other freshwater species.Moving forward，we need to balance the needs of humans with the needs of life in rivers and seas.Humans should not live alone on this planet."
（1）What can we say about the Chinese paddlefish？ CC
A．It is the largest fish.
B．It appeared earlier than dinosaurs.
C．It is a kind of ancient fish.
D．It was a welcome dish for the fishermen.
（2）What is Paragraph 4 mainly about？ DD
A．The design problems of the Gezhouba Dam.
B．The worsening ecosystem in the Yangtze River.
C．The population development of the Chinese paddlefish.
D．The main reason for the dying out of the Chinese paddlefish.
（3）How does Ms Pan feel about the extinction of the Chinese paddlefish？ CC
A．Angry.
B．Doubtful.
C．Worried.
D．Unconcerned.
（4）In which section of The Associated Press may this text most probably appear？ AA
A．Environment.
B．Science.
C．Culture.
D．Tourism.
【考點】環(huán)境保護；說明文．
【答案】C；D；C；A
【解答】
【點評】
聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書面同意，不得復(fù)制發(fā)布。
發(fā)布：2024/6/27 10:35:59組卷：2引用：1難度：0.6
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