Câu hỏi:
23/04/2022 285Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Coral reefs are some of the most diverse ecosystems in the world, housing tens of thousands of marine species. With their hardened surfaces, corals are sometimes mistaken as being rocks. And, because they are attached, “taking root” to the seafloor, they are often mistaken for plants. However, unlike rocks, corals are alive. And unlike plants, corals do not make their own food. Corals are in fact animals. Appearing as solitary forms in the fossil record more than 400 million years ago, corals are extremely ancient animals that evolved into modern reef-building forms over the last 25 million years.
Coral reefs are the largest structures on earth of biological origin. Coral reefs are unique and complex systems. Rivaling old growth forests in longevity of their ecological communities, well-developed reefs reflect thousands of years of history.
Corals are ancient animals related to jellyfish and anemones. The branch or mound that we often call “a coral” is actually made up of thousands of tiny animals called polyps. A coral polyp is an invertebrate that can be no bigger than a pinhead to up to 30 centimeters (1 foot) in diameter. The polyps extend their tentacles at night to sting and ingest tiny organisms called plankton and other small creatures. Each polyp has a saclike body and a mouth that is encircled by stinging tentacles. The polyp uses calcium carbonate (limestone) from seawater to build a hard, cup-shaped skeleton. This skeleton protects the soft, delicate body of the polyp.
Reefs only occur in shallow areas that are reachable by sunlight because of the relationship between coral and algae. Various types of microscopic algae, known as Symbiodinium, live inside of the coral, providing them with food and helping them to grow faster.
There are over 2,500 kinds (species) of corals. About 1,000 are the hard corals that build coral reefs. Other corals are soft corals. Soft corals have skeletons that are flexible and can bend with the water. The three main types of coral reefs are fringing reefs, barrier reefs, and coral atolls. The most common type of reef is the fringing reef. This type of reef grows seaward directly from the shore. They form borders along the shoreline and surrounding islands. When a fringing reef continues to grow upward from a volcanic island that has sunk entirely below sea level, an atoll is formed. Atolls are usually circular or oval in shape, with an open lagoon in the center. Any reef that is called a barrier reef gets its name because its presence protects the shallow waters along the shore from the open sea. That protection promotes the survival of many types of sea plant and animal life.
(Adapted from http://justfunfacts.com)
Which of the following could best reflect the main purpose of the author in the passage?
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Trả lời:
Đáp án B
Câu nào sau đây thể hiện chính xác nhất mục đích chính của tác giả trong bài đọc?
A. Nhằm chứng minh rằng dải san hô ngầm là động vật.
B. Để cung cấp các thông tin thật về dải san hô ngầm.
C. Để giải thích rằng dải san hô ngầm là hệ sinh thái đa dạng nhất dưới đại dương.
D. Để phân biệt dải san hô ngầm và các động vật khác.
Căn cứ vào thông tin toàn bài:
Bài đọc cung cấp cho chúng ta toàn bộ thông tin về loài san hô, từ cấu tạo (đoạn 2, 3), nơi sinh sống (đoạn 4) và các loại san hô (đoạn cuối). Như vậy, đáp án A bao quát được nội dung toàn bài, các đáp án còn lại chỉ là một phần tạo nên nội dung chính toàn bộ bài.
Đã bán 152
Đã bán 114
Đã bán 132
Đã bán 47
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Gender ____ is not only a fundamental human right, but a necessary foundation for a peaceful, prosperous and sustainable world.
Câu 2:
Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.
It is against the school rules to cheat in the test.
Câu 3:
Câu 4:
Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
A lot of adults pay lip service to the idea that it is important to listen to teenagers' ideas, but they tend to listen and then forget.
Câu 5:
It is the classical Athenians who can probably lay claim ____ the invention of commercial advertising as we know it today.
Câu 7:
Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
The manager needs an assistant that he can count on to take care of problems in his absence.
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