Question

【题目】 Sea urchins(海胆) are small creatures , but what’s really remarkable about them is that they eat anything that happens to float by. They have really sharp teeth they use to rid rocks of algae(海藻)which makes them pretty valuable especially in places like Hawaii where algae are threatening the coral reefs. In the summer of 2019, 500,000 of them were used to deal with the algae.

The problem started when non-native algae were introduced to the ecosystem of Kaneohe Bay in the 1970s. Because they had no enemies, they ended up taking over the bay, according to the National Marine Fisheries Service (NMFS). The algae blocked sunlight from reaching the coral, which in turn affected the local fish because they changed the chemistry of the water.

That’s when the NMFS turned to sea urchins that loved to devour the algae. But they had to grow to the size of a cherry tomato before they could be used. Since 2011, sea urchins have been grown and used to handle the algae problem. Some of the funds are available due to an unfortunate incident. In 2005, a ship was grounded on a shallow reef near Kaneohe Bay. When the ship was removed, 20 acres of reefs have been damaged. When there is environmental damage, the NMFS and other agencies receive funds from the wrongdoers and the funds are used to restore the damage. Some funds were spent on other projects like the sea urchins. The state of Hawaii began to grow the sea urchins. When they are large enough, divers carefully place them on the reef.

Algae isn’t the only thing that threatens the coral reefs. Climate change and the effects of fishing and tourism in the area also endanger the coral reefs. But turning to sea urchins instead of man-made solutions seems like the best way to go.

【1】Why are sea urchins regarded as outstanding creatures?

A.They are tiny but have teeth.

B.They can keep the ocean clean.

C.They can remove harmful algae.

D.They grow on coral reefs with algae.

【2】What happened after non-native algae arrived at Kaneohe Bay?

A.They helped the coral reefs to survive.

B.They spread to every corner of the bay.

C.They didn't fit in with the new surroundings.

D.They fought against other species to get food.

【3】Which word can replace the underlined word “devour” in paragraph 3?

A.EatB.Block

C.AttackD.Attract

【4】What does the author suggest doing to save coral reefs?

A.Banning fishing and tourism.B.Relying on humans’ solutions.

C.Employing divers to handle algae.D.Letting nature take care of nature.

Answer 1

【答案】

【1】C

【2】B

【3】A

【4】D

【解析】

这是一篇说明文。文章介绍了海胆。海胆之所以被认为是杰出的生物是因为它们可以清除有害藻类。藻类并不是唯一威胁珊瑚礁的东西。气候变化以及该地区渔业和旅游业的影响也威胁着珊瑚礁。但是用海胆代替人工解决方案似乎是最好的选择。

【1】

细节理解题。根据第一段中They have really sharp teeth they use to rid rocks of algae(海藻)which makes them pretty valuable especially in places like Hawaii where algae are threatening the coral reefs.“它们有锋利的牙齿用来清除岩石上的藻类，这使它们非常珍贵，尤其是在夏威夷这样的地方，那里的藻类正在威胁珊瑚礁。”由此可知，海胆之所以被认为是杰出的生物是因为它们可以清除有害藻类。故选C。

【2】

推理判断题。根据第二段中The problem started when non-native algae were introduced to the ecosystem of Kaneohe Bay in the 1970s. Because they had no enemies, they ended up taking over the bay,“这一问题始于20世纪70年代非本地藻类被引入卡内奥河湾的生态系统。因为它们没有敌人，它们最终占领了海湾，”由此可知，非本地藻类到达卡内奥河湾后，它们散布到海湾的每一个角落。故选B。

【3】

词义猜测题。根据第三段第二句But they had to grow to the size of a cherry tomato before they could be used.“但它们必须长到樱桃番茄的大小才能被使用。”可知，sea urchins that loved to devour the algae“海胆喜欢吃海藻”。由此推知划线词的意思是“吃”。故选A。

【4】

推理判断题。根据最后一段Algae isn’t the only thing that threatens the coral reefs. Climate change and the effects of fishing and tourism in the area also endanger the coral reefs. But turning to sea urchins instead of man-made solutions seems like the best way to go.“藻类并不是唯一威胁珊瑚礁的东西。气候变化以及该地区渔业和旅游业的影响也威胁着珊瑚礁。但是用海胆代替人工解决方案似乎是最好的选择。”由此可知，作者建议让大自然照顾大自然来拯救珊瑚礁。故选D。