
It was a beautiful fall day. I was out riding my bicycle. I guessed I rode over a hole in the road. All of a sudden, WHAM(砰)! I fell off my bicycle. My right side really h
My head hit the ground h
As I lay there, I took off my helmet. There was a sharp rock sticking out of it. I looked at it in f
I shouted for help. At that time, a truck went by. The driver s
When my mother got to the hospital, she gave me a big hug(拥抱). “I’m so glad you were wearing your helmet. The helmet saved your life,” she said. She knew I was c

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

