Two boys have the same name. But they are in different schools. What are they like? One John is tall and thin, but the other (另一个) John is short and strong. One John is funny and clever, but the other John is shy and hard-working, but they are both polite.
The two Johns live in different places. One John lives in the city (城市). There are many buildings here. He can see many buses and cars every day. He often goes to the park and plays the guitar. He likes his city very much.
The other John lives in the country (乡村). There are many houses everywhere. He can see many cows and sheep every day. He often goes fishing and reads books near the river. He likes his country very much.
But they are friends, they often chat on We chat (微信).
Look! This is John, He’s
Look at this boy. He is John, too. He’s short and strong. He’s
He
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