搜索
Antarctica |
 WeatherAntarctica lies in the most southern part of the world. It is the coldest area on Earth. There isn’t much rain, but there is a lot of snow and wind. The lowest temperature was on 21 July in 1983 at -89.2℃! |
 PopulationNobody lives in Antarctica all the time! The first people to stay there for a while were fishermen in 1786. Now there are about 5, 000 scientists and researchers there in the summer. |
 History of exploration (探险)During 1907-1909, British explorer Earnest Shackleton explored Antarctica on foot. In 1911, two explorers—a British man named Scott and a Norwegian named Amundsen—raced 1, 400 kilometres to the South Pole (南极). Amundsen arrived first. |
 Animals and birdsThere aren’t any large animals in Antarctica. Polar bears live at the North Pole. But there are a lot of penguins and seabirds. Every spring there are over 100 million seabirds in Antarctica. |
1．When did the lowest temperature appear in Antarctica?
| A．In 1786. | B．In 1907. | C．In 1911. | D．In 1983. |
| A．Fishermen. | B．Scientists. | C．Researchers. | D．Explorers. |
| A．Britain. | B．Norway. | C．The South Pole. | D．The North Pole. |
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
