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Hello! I’m Li Lei. My school is big and beautiful. There are thirty classrooms in my school. I’m in Class Five Grade Four. There are twenty boys and nineteen girls in my class. I have four lessons in the morning and three lessons in the afternoon. I like science best. I have science lessons on Wednesday and Friday. I like swimming, too. I usually go swimming on weekends.
1．Li Lei’s school is big and beautiful.2．There are thirty-nine students in Li Lei’s class.
3．Li Lei is in Class Four Grade Five.
4．Li Lei has four lessons in the afternoon.
5．Li Lei likes science and swimming.
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
