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,根据所听对话及问题,选择正确的答案。(听两遍)
(      ) 1. A. It is rainy.                    B. It was rainy.                  C. It was cloudy.
(      ) 2. A. Shanghai.                    B. Beijing.                         C. Nanjing.
(      ) 3. A. An orange sweater and black trousers.     B. A black T-shirt and red shorts.
C. A yellow jacket and blue jeans.
(      ) 4. A. In the kitchen.               B. In the living room.          C. In the bedroom.
(      ) 5. A. Suzhou.                       B. Shanghai.                      C. Beijing.
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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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