Question

【题目】Box jellyfish （箱型水母）are the most poisonous marine animals known to man. They measure 3 meters long and weigh up to 2 kilograms. They are pale blue and transparent in color, and get their name from the cube--like shape of their body, Box jellyfish have 6 eyes on all 4 sides of their body, although it is uncertain how they process what they see as they do not have a central nervous system. They also have up to 15 tentacles （触须）growing from each corner of their body that have about 5,000 stinging（带刺的）cells each.

Box jellyfish can be found primarily in the coastal waters off Northern Australia as well as throughout the Indo--Pacific. They prefer to live at river mouths. They do not have any organs to breathe, and will sleep on the ocean floor from 3 pm to dawn. Unlike other jellyfish that merely move along with the current, box jellyfish have developed a way to travel wherever they want to go. They will shoot themselves in a jet-like fashion, reaching speeds of up to 7.4 kilometers per hour.

The diet of box jellyfish consists of thing like fish, small animals, and even other jellyfish. They use their venom, a chemical which causes heart, skin, and breath failure, to kill their prey（猎物）. Since box jellyfish have eyes, some scientists believe that they actively hunt their prey while others insist that they are just passive opportunists that will wait and catch anything that wanders into their tentacles.

Box jellyfish are responsible for more human deaths in Australia than snakes, sharks, and salt-water crocodiles combined. It is best to avoid them as most stings(刺) will result in death. Hopefully, humans and box jellyfish can find a way to live with one another while keeping conflicts to a bare minimum. After all, such a unique species of jellyfish deserves to live and grow just as humans do.

【1】What do we NOT know about box jellyfish from the first paragraph?

A. Its size. B. Its hardness.

C. Its color. D. Its poisonousness

【2】What can be learned about box jellyfish from Paragraph 2?

A. They live in the deep sea in groups

B. They can breathe on the ocean floor.

C. They usually move along with the current.

D. They can decide the direction in which they move.

【3】 The underlined word “they” in Paragraph3 refers to ________.

A. box jellyfish

B. scientists

C. box jellyfish’s prey

D. box jellyfish’s tentacles

【4】 The text is mainly about _________.

A. a kind of sea animal

B. some poisonous animals

C. scientists’ research into box jellyfish

D. the relationship between humans and jellyfish

Answer 1

【答案】

【1】B

【2】D

【3】A

【4】A

【解析】

试题分析: 箱式水母的毒性对人类来说是最毒的。箱型水母主要在澳大利亚北部以及整个印度洋 —太平洋沿海水域。箱形水母的食物包括鱼、 小动物和甚至其他水母一样的东西。它的刺能致人死亡。

【1】B 细节理解题。第一段的第一句话说箱式水母的毒性对人类来说是最毒的；第二句话说它的大小；第三句话说颜色是浅蓝色的；接下来介绍名字的由来，还有身体特征。所以没有说它的硬度，故选B。

【2】D 推理判断题。第二段的大意是：箱型水母主要在澳大利亚北部以及整个印度洋 —太平洋沿海水域。他们更愿意住在河流的入海口。他们没有呼吸器官，会从下午3点到黎明睡在海底。不同于其他只是随着水流移动的水母，箱形水母可以去他们想要去的地方。所以选择D。

【3】A 词义推测题。根据该词所在的第二段的内容可知，they前面一直在介绍箱式水母的生活习性，本句是说它们在水中移动的方式和速度。故选A。

【4】A 主旨大意题。本文主要是介绍了箱式水母这种海洋生物的体型特征、生活习性和它对人类的毒性。故选A。