学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.64
所属科目:小学英语
Daming爱照相,请你帮他圈出恰当的图片说明。
[[QOrDeR]]
A.It’s my toy car.
B.It’s my toy ship.
【小题2】
A.I have breakfast at half past seven.
B.I go to school at half past seven.
【小题3】
A.My mother goes to work by bike.
B.My mother goes to work by car.
【小题4】
A.I play football at the weekend.
B.I watch TV at the weekend.
【小题5】
A.My father is reading a book.
B.My father is riding a bike.
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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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