学进去-教育应平等而普惠
试题
类型:其他
难度系数:0.65
所属科目:小学英语
A. you should let old people sit down first.
B. you should say, “Hello. ”
C. you should say, “Pardon me?”
D. you should say, “I’m sorry. ”
E. you should turn off the lights and fans.
F. you should line up and wait.

例句:When the bus is coming, F
1.When you don’t hear something, ______
2.When you make a mistake, ______
3.When you get on the bus, ______
4.When you answer the phone, ______
5.When you leave a room, ______
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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

用户名称
2019-09-19

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

用户名称
2019-09-19
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