学进去-教育应平等而普惠
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难度系数:0.65
所属科目:小学英语
听录音,选出与你所听到的句子相对应的答语。读三遍。
(      ) 1.A.OK.        B. Sorry, I can’t.        C. I don’t think so.
(      ) 2. A. Thank you!        B. Hooray!        C. That’s right!
(      ) 3. A. Yes, I do.        B. Yes, I will.        C. Yes, I did.
(      ) 4. A. I’m going to have lunch.       B. I’m cleaning my room.     C. I played baseball.
(      ) 5. A. At 8 o’clock.        B. To Hangzhou        C. With my friends.
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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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