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| A． It is a nice day. John and Jim go to a nature park. There is a big forest in the park. There is a beautiful lake near the forest and they can see some fishes in it. There is a bridge on the river in front of the lake. They take some pictures on the bridge. They want to climb the mountains, but they have no time. （1）There are many trees in the park. （2）There are some fishes in the forest. （3）John and Jim can see a bridge in the park. （4）There are some mountains in the park. （5）John and Jim climb a mountain in the park. |
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
