学进去-教育应平等而普惠
试题
类型:匹配题
难度系数:0.64
所属科目:小学英语
根据<A>栏中的问句,在<B>栏中选出正确答语。
<A>
(   )1. How many books do you have?
(   )2. How many ducks can you see?
(   )3. Can I use you pen?
(   )4. Where are you from?
(   )5. Who's that man?
<B>
A.I'm from America.
B.He's Mr Black.
C.I have sixteen.
D.I can see twelve.
 
E.No problem.
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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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