搜索
A.
B.
C.
D.
E.
F.
1．The old man wants to buy a pair of shoes. He is asking the way.
2．I have a pet dog. I often walk it after school.
3．Mum is worried because my grandma is ill.
4．My brother likes to listen to all kinds of music.
5．Tree-planting Day is on March 12th in China. People often plant trees on this day.
6．The Spring Festival is a big holiday in China. It’s in January or February. People often visit their friends and relatives.
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
