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Not long ago, Egypt marked the 150th anniversary of the opening of the Suez Canal. The canal connects the Mediterranean Sea to the Red Sea and the Indian Ocean. It helped speed world trade between the East and the West. But the man-made waterway has also helped speed the rise of other things, such as invasive(入侵的)non-native species (物种). Scientists say the invasive creatures have damaged the Mediterranean’s environment and caused native species to disappear.

The number of non-native creatures has risen since the Suez Canal was widened in 2015. The “New Suez Canal” has raised concerns in Europe and brought disagreement from many Mediterranean countries. Bella Galil is an Israeli biologist who has studied the Mediterranean for over 30 years. She says much of the ecological(生态的)damage cannot be repaired. She said urgent action is needed to ease the effects of the invasive fish and other sea life.

Galil works at Tel Aviv University’s Steinhardt Museum of Natural History. She noted that the widening and deepening of the Suez Canal has created a “moving aquarium” of species. These creatures could make coastal waters almost unusable for human beings. Galil believes the number of invasive species has reached 400. That is twice the number 30 years ago. She said this is a “historic example of the dangers of unintended consequences.”

Israel is now dealing with huge numbers of poisonous(有毒的) jellyfish that affect coastal power centers and keep people from visiting the seashore. Other poisonous species, such as the lionfish and silver-cheeked toadfish, are also appearing.

Galil said the problems of invasive species can be compared to those of climate change, pollution and over-fishing. She argues that the new species have caused a major “restructuring” of the environment. This has endangered native species.

Some experts have suggested that increasing salt levels in the canal itself could create a barrier(障碍物) that would keep invasive species out.

1.What lesson can we learn from the effects of the Suez Canal?

A.Seeing is believing. B.Every coin has two sides.

C.Let nature take its course. D.Everyone makes mistakes.

2.What’s the attitude of many Mediterranean countries towards the“New Suez Canal"?

A.Uncaring. B.Unclear. C.Supportive. D.Against.

3.What is the ecological environment like after the Suez Canal reconstruction?

A.It is from bad to worse. B.It remains the same.

C.It improves a great deal. D.It has become a completely new one.

4.Why did Galil mention climate change,pollution and over-fishing in paragraph 5?

A.To add some background information. B.To stress the harm of invasive species.

C.To solve the problem of invasive species. D.To compare their similarities and differences.

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