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There are many kinds of tigers all over the world, and now the heaviest 1． is Siberian Tigers（东北虎）. Most Siberian Tigers 2． in the northeast of China, such as Heilongjiang Province 3． Jilin Province. The tigers usually like living there because there are 4． forests and mountains. In the forests and mountains, there 5． few people. So tigers are free. They run after each other, 6． and eat small animals 7． rabbits.
Siberian Tigers are 8． from other tigers. For example, Siberian Tigers can swim very 9．, and they can climb trees. Siberian Tigers’ hearing is good and they can hear a very low 10．. Now the number of Siberian Tigers is becoming smaller and smaller. We should try our best to protect them.
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
