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One day, an old man is walking in a street. He sees a little boy trying to reach a doorbell(按门铃). But the boy is so short that he can't. The old man is a kind man, so he says to the little boy. “I'll help you.” Then he pulls the bell so hard that everyone can hear the bell.
The little boy looks up at him and says, “Now let's run away. Come on. ''And then the old man knows what is happening(发生). The naughty boy runs away.
1．An old man wants to ring the doorbell. （______）2．The little boy wants to ring the bell. （______）
3．The boy wants to go into the room. （______）
4．The boy cannot touch the bell. （______）
5．The man wants to help the boy and he rings the bell very hard. （______）
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
