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Have you ever been to Venice. Around the world, no city is quite like Venice, Italy. Tourists love its beautiful old buildings and squares. But What makes Venice a really special place is the water. The beautiful city is built on a group of islands in a large lagoon(泻湖）beside the ocean. 1．
However, it’s said that Venice is in danger from this water. What is happening? 2．At high tides(涨潮时), the water in the lagoon rises. Sometimes it rises higher than usual and floods the city. Because Venice is lower than it was the past, the flooding is happening more often. This is taking down the city’s ancient buildings.
A3．The name of project is MOS
| A．Marco Armillis, an engineer, explains how it will work. “We are putting seventy-eight big floodgates(防洪水闸）at the places where the lagoon meets the ocean. The floodgates will close when there are high tides, to stop seawater from coming into the lagoon. |
The MOSE project will cost about seven billion dollars and has already taken many years to build. If everything goes well, then in few years ‘time the seawater will not flood into Venice’s lagoon. Venice’s beautiful buildings will be safe for a long time.5．
| A．Luckily, engineers are working on a great project to save Venice. |
| B．And the city will still be there for people to visit long into the future. |
| C．Rivers run through it like streets, and people travel around it into boats. |
| D．This will help to stop the level of the lagoon from rising. |
| E．Venice is enjoyed by the young people from all parts of the world. |
| F．The city has been very slowly going down into the lagoon for many years. |
| G．However, scientists in Italy haven’t got a good idea to solve the problem |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
