Read 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 from 28 to 34.
A rather surprising geographical feature of Antarctica is that a huge freshwater lake, one of the world's largest and deepest, lies hidden there under four kilometers of ice. Now known as Lake Vostok, this huge body of water is located under the ice block that comprises Antarctica. The lake is able to exist in its unfrozen state beneath this block of ice because its waters are warmed by geothermal heat from the earth's core. The thick glacier above Lake Vostok actually insulates it from the frigid temperatures on the surface.
The lake was first discovered in the 1970s while a research team was conducting an aerial survey of the area. Radio waves from the survey equipment penetrated the ice and revealed a body of water of indeterminate size. It was not until much more recently that data collected by satellite made scientists aware of the tremendous size of the lake; the satellite-borne radar detected an extremely flat region where the ice remains level because it is floating on the water of the lake.
The discovery of such a huge freshwater lake trapped under Antarctica is of interest to the scientific community because of the potential that the lake contains ancient microbes that have survived for thousands upon thousands of years, unaffected by factors such as nuclear fallout and elevated ultraviolet light that have affected organisms in more exposed areas. The downside of the discovery, however, lies in the difficulty of conducting research on the lake in such a harsh climate and in the problems associated with obtaining uncontaminated samples from the lake without actually exposing the lake to contamination. Scientists are looking for possible ways to accomplish this.
All of the following are true about the 1970 survey of Antarctica EXCEPT that it ______.
A. was conducted by air
B. made use of radio waves
C. could not determine the lake's exact size
D. was controlled by a satellite
Đáp án D.
Key words: 1970 survey, Antarctica, except
Clue: aerial survey (= conducted by air), radio waves penetrated the ice (made use of radio waves), indeterminate size (could not determine the lake's exact size), It was not until much more recently that data collected by satellite: Nghiên cứu về Nam Cực năm 1970 là một nghiên cứu được thực hiện trên không, dùng sóng radio và chưa thể xác định được kích thước chính xác của hồ; phải đến gần đây thỉ nghiệm mới được điều khiến bằng vệ tinh.
Đề bài yêu cầu tìm câu sai do đó đáp án chính xác là D. was controlled by a satellite