学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,为你所听到的问句选择正确的答语,每个小题读两遍。
(      ) 1. A. Yes, it is.                      B. Yes, there is.                            C. No, he isn’t.
(      ) 2. A. He was a driver.            B. He liked going to school.            C. He bought some books.
(      ) 3. A. I’m going to swim.        B. I’m going to the theatre.            C. I’m listening to music.
(      ) 4. A. My friend.                    B. By bus.                                 C. At nine o’clock.
(      ) 5. A. I’m at the station.          B. I’m going to play chess.            C. I’m hungry.
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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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