1. ( )
A. watch TV B. play computers
2. ( )
A. have dinner B. clean the room
3. ( )
A. go to school B. have a picnic
4. ( )
A. do homework B. watch a film
5. ( )
A. on the moon B. go swimming
6. ( )
A. in a spaceship B. on the moon
7. ( )
A. play basketball B. play football
8. ( )
A. singing contest B. writing contest
9.( )
A. high jump B. long jump
10.( )
A. read books B. tell a story
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