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,根据所听句子,选择正确的答句。(听两遍)
(      ) 1. A. I like Science.                      B. I like pandas.                           C. I like spring.
(      ) 2. A. It's on the sofa.                    B. It's red.                                   C. It's my bag.
(      ) 3. A. Yes, I do.                            B. Good idea!                              C. What a pity!
(      ) 4. A. We usually fly kites.             B. We usually make snowmen.        C. We usually eat ice creams.
(      ) 5. A. Let's make some snowmen.     B. Let's go swimming in the pool.     C. Let's fly kites in the park.
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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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