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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped near natural sources of fresh water, and populations were so sparse that pollution of the water supply was not a serious problem. After community life developed and agricultural villages became urban centers, the problem of supplying water became ...
Phạm Văn Bắc | Chat Online | |
03/09 13:26:08 (Tiếng Anh - Lớp 12) |
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 33 to 40.
Early peoples had no need of engineering works to supply their water. Hunters and nomads camped near natural sources of fresh water, and populations were so sparse that pollution of the water supply was not a serious problem. After community life developed and agricultural villages became urban centers, the problem of supplying water became important for inhabitants of a city, as well as for irrigation of the farms surrounding the city. Irrigation works were known in prehistoric times, and before 2000 BC the rulers of Babylonia and Egypt constructed systems of dams and canals to impound the flood waters of the Euphrates and Nile rivers, controlling floods and providing irrigation water throughout the dry season. Such irrigation canals also supplied water for domestic purposes. The first people to consider the sanitation of their water supply were the ancient Romans, who constructed a vast system of aqueducts to bring the clean waters of the Apennine Mountains into the city and built basins and filters along these mains to ensure the clarity of the water. The construction of such extensive water-supply systems declined when the Roman Empire disintegrated, and for several centuries local springs and wells formed the main source of domestic and industrial water.
The invention of the force pump in England in the middle of the 16th century greatly extended the possibilities of development of water-supply systems. In London, the first pumping waterworks was completed in 1562; it pumped river water to a reservoir about 37 m above the level of the River Thames and from the reservoir the water was distributed by gravity, through lead pipes, to buildings in the vicinity. Increased per-capita demand has coincided with water shortages in many countries. Southeast England, for example, receives only 14 per cent of Britain's rainfall, has30 per cent of its population, and has experienced declining winter rainfall since the 1980s.
In recent years a great deal of interest has been shown in the conversion of seawater to fresh water to provide drinking water for very dry areas, such as the Middle East. Several different processes, including distillation, electrodialysis, reverse osmosis, and direct-freeze evaporation, have been developed for this purpose. Some of these processes have been used in large facilities in the United States. Although these processes are successful, the cost of treating seawater is much higher than that for treating fresh water.
From A. Briggs’ article on culture, Microsoft® Student 2008
Clean water supply was first taken into consideration by ______.
Lựa chọn một trả lời để xem Đáp án chính xác Báo sai đáp án hoặc câu hỏi |
A. the US people 0 % | 0 phiếu |
B. the English people 0 % | 0 phiếu |
C. the ancient Romans 0 % | 0 phiếu |
D. the Egyptians 0 % | 0 phiếu |
Tổng cộng: | 0 trả lời |
Tags: 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 33 to 40.,From A. Briggs’ article on culture. Microsoft® Student 2008,Clean water supply was first taken into consideration by ______.
Trắc nghiệm liên quan
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- 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 33 to 40.Early peoples had no need of engineering works to supply their water. Hunters and nomads camped ... (Tiếng Anh - Lớp 12)
- Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.Think about the interviewer’s comments because they may help you prepare better when you are ... (Tiếng Anh - Lớp 12)
- Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.“What I’ve got to say to you now is strictly off the record and most certainly not for ... (Tiếng Anh - Lớp 12)
- Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in theposition ofprimary stress in each of the following questions from 29 to 30. (Tiếng Anh - Lớp 12)
Trắc nghiệm mới nhất
- Đọc thầm văn bản sau và trả lời câu hỏi: THUẦN PHỤC SƯ TỬ Ha-li-ma lấy chồng được hai năm. Trước khi cưới, chồng nàng là một người dễ mến, lúc nào cũng tươi cười. Vậy mà giờ đây, chỉ thấy chàng cau có, gắt gỏng. Không biết làm thế nào, ... (Tiếng Việt - Lớp 5)
- Tìm một số biết rằng nếu ta gấp 3 lần số đó rồi cộng với 21,5 rồi trừ đi 1,5 được kết quả là 35,9. Số đó là: (Toán học - Lớp 5)
- Số thích hợp để điền vào ô trống là: 438 : 12 + 3,5 = ? (Toán học - Lớp 5)
- Kết quả của phép tính 7,75 : 2,5 là: (Toán học - Lớp 5)
- Kết quả của phép tính 15 : 0,25 là: (Toán học - Lớp 5)
- Trong 4 giờ ô tô đi được 210 km với vận tốc không đổi. Hỏi mỗi giờ ô tô đi được bao nhiêu ki-lô-mét? (Toán học - Lớp 5)
- Cả 5 con vịt cân nặng 8 kg. Hỏi trung bình mỗi con vịt cân nặng bao nhiêu ki-lô-gam? (Toán học - Lớp 5)
- 15 căn phòng như nhau có diện tích là 1 447,5 m2. Hỏi 8 căn phòng như thế có diện tích là bao nhiêu mét vuông? (Toán học - Lớp 5)
- Một tấm thảm hình vuông có chu vi 2,4 m. Diện tích của tấm thảm đó là: (Toán học - Lớp 5)
- Sợi dây thứ nhất dài 52,5 m, sợi dây thứ hai dài bằng 110 sợi dây thứ nhất. Vậy hai sợi dây dài là: (Toán học - Lớp 5)