高中英语译林版（2019）必修第三册英语 Unit 1--Unit2 单元基础综合练习试卷（含解析）

2025--2026年高一译林版必修第三册英语 Unit 1--Unit2 单元基础综合练习试卷【含答案word版无听力】 一、阅读单选（3题）（本大题共1小题） For years, scientists have believed that the only way oxygen could be created in the ocean was through photosynthesis(光合作用). That’s how plants turn sunlight into energy while also producing oxygen. Huge amounts of oxygen get produced in the sunlight of the upper ocean, but scientists expected that on the dark ocean bottom, oxygen levels would drop as animals used the water’s oxygen for energy. But in 2013, Andrew Sweetman, a scientist who studies the ocean floor, began to notice something strange. When he measured the oxygen in the water above the ocean floor, he found that the levels of oxygen were rising. That didn’t make sense. Dr. Sweetman thought his equipment wasn’t working. In 2021, he used a different method to measure the oxygen levels. The new measurements also showed oxygen levels rising. That’s when he realized something unusual was going on. Somehow, oxygen was being created on the dark ocean floor. Dr. Sweetman noticed that some small rock-like objects called “polymetallic nodules(多金属结核)”, which form naturally on the ocean floor over millions of years may be responsible for creating the “dark oxygen”. To learn more about how the oxygen was being created, Dr. Sweetman collected some of the nodules and the ocean floor around them and took them back to the laboratory to study. At first, they thought that tiny living things called microbes might be creating the oxygen. Then they thought that the nodules might be giving off the oxygen somehow. But neither idea was right. Finally, Dr. Sweetman began to wonder if the nodules were somehow acting like batteries(电池), and producing electricity. The idea made sense. After all, when electricity is passed through salt water, it separates the water into hydrogen and oxygen in a process called “electrolysis”. Working with scientists at Northwestern University, Dr. Sweetman discovered that the nodules produce a small amount of electricity. When the nodules are close together, they create enough electricity to produce the oxygen that Dr. Sweetman had found. The discovery raises more concerns about deep-sea mining. These nodules are exactly what many mining companies are hoping to collect. The nodules are full of important metals. Dr. Sweetman believes that mining groups should think carefully about the new discovery before they start mining. The scientists say that the nodules may be important to the way the deep sea works. They are afraid that deep-sea mining could destroy the nodules and the environment around them. 1．What did Andrew Sweetman find strange A．Photosynthesis is not the only way to create oxygen. B．The levels of oxygen of the upper ocean fell sharply. C．His equipment used to measure oxygen didn’t function. D．Oxygen levels on the ocean floor increase unexpectedly. 2．Paragraph 3 and 4 are mainly about how Dr. Sweetman _____. A．fo ... ...