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
听问句,选答语。
_______)1. A. Yes, I am.          B. No. he isn’t        C. Yes, she is.
_______)2. A. I’m a good girl.              B. I’m washing the clothes.
C. Mum is cleaning the room.
_______)3. A. We have music lessons in it.        B. This is our music club.
C. We have two.
_______)4. A. Sure. Here you are.       B. They’re expensive.         C. No, I don’t.
_______)5. A. They’re sixty yuan.       B. It’s sixty yuan.             C. I have sixty.
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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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