搜索
Lily and Lucy are twins. They come from America. They came to China in 2004 because their parents came to China to work. Their father is an engineer, and their mother is a teacher. Lily and Lucy are 12 years old. They are in Grade 5, but they are in different classes. Lily is in Class 1 and Mary is in Class 3. They walk to school every day. They have many friends in China. The girls and their friends often play together. They like hiking with their friends in summer and making snowmen with them in winter. They enjoy their life in China.
1．Lily and Lucy are American girls.2．Their mother is an engineer.
3．Lily and Lucy are in the same class.
4．Lily and Lucy like hiking in summer.
5．They live in China now.
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
