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:0.85
所属科目:小学英语
听录音,根据所听句子,选择正确的答句。
(      ) 1. A. I will ask my e-friend in Australia.
B. I will visit London,
C. I will help my Chinese teacher.
(      ) 2. A. Big Ben.       B. Tower Bridge.             C. The Great Wall.
(      ) 3. A. Yes, she is.       B. No, she doesn't.       C. Yes, she will.
(      ) 4. A. Iwill watch an Australian football game.
B. I watched an Australian football game.
C. I'm watching an Australian football game.
(      ) 5. A. It's in the UK.       B. It's in the US.             C. It's in Australia.
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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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