学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听录音,给问句选择恰当的答语。
____)1.A.She’s watching TV. 
B.He’s watching TV. 
C.I’m watching TV.
____)2.A.My mother is helping him?
B.I’m at home. 
C.He’s cleaning the car.
____)3.A.She’s Nancy. 
B.I’m Nancy. 
C.She is sweeping the floor.
____)4.A.They are cleaning the car. 
B.He’s reading a book. 
C.She’s watching TV.
____)5.A.Jim comes. 
B.In the living room. 
C.In the afternoon.
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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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