搜索
| A. Miss Jones teaches math in a school. The pupils are not good at math. Miss Jones always wants to make her lessons interesting. B. Children should do some chores. They can water the plants, take out the rubbish, sweep the floor and so on. Doing chores is really good for children. C. There is a “farm” in my school. We plant vegetables at school. There are tomatoes, carrots and green beans. Our lunch comes from our farm. D. American children love to watch television. Some children spend six hours a day watching TV. Some even watch TV for eight hours or more on Saturday. E. Why do the ducks swim in a line? When mother duck swims, she leaves waves behind. Following their mother, baby ducks can swim in the waves. Some waves make them swim easily. |
2．
3．
4．
5．
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
