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A city without cars would be very strange, right? But Venice is a city. Venice is in the northeast of Italy. It wasn't built on land, like Beijing or Shanghai, but on more than 110 islands.
Even so, travel isn't difficult. The waterways have always been the best ways to get around. There are 117 waterways and more than 400 bridges that can guide you where you want to go.
Venice grew out of small island in saltwater lakes when some Italians escape from a war more than 1,500 years ago, and built homes there.
Once, people used too much underground water. This made the city get lower little by little.
| A．Water makes the city special, but it is also a big problem. |
| B．This has made the ice of the Arctic Ocean melt. |
| C．Seawater is everywhere around the city. |
| D．Now the city has gone down by 23 centimeters. |
| E．People in Venice move from place to place by boat. |
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
