搜索
（ ）（6）A. write a letter
B. write an e-mail
C. write an e-card
（ ）（7）A. talking to the teacher
B. taking pictures
C. watching insects
（ ）（8）A. Children’s Day
B. Teachers’ Day
C. National Day
（ ）（9）A. It’s windy and warm in spring
B. It’s windy and cold in winter.
C. It’s windy and cool in fall.
（ ）（10）A. What’s the date?
B. What day is it today?
C. When is your birthday?
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
