搜索
Jack: It’s OK. You know today is Friday. I like Friday.
Cindy:
Jack: First, because the next day is Saturday.
Cindy: That’s true.
Jack: Well, we love the same day. I have a science class on Friday. It’s my favorite subject.
Cindy:
Jack: Mr. White. His class is very interesting. What subject do you like?
Cindy:
Jack: I love P. E., too.
Cindy:
Jack: Great! I have two ping-pong bats. Let me get them.
Cindy: OK, see you then.
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
