学进去-教育应平等而普惠
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难度系数:0.85
所属科目:小学英语
听录音选出句中所缺内容。每小题读两遍。
(      ) 1. The yellow river is more than _______ kilometers long.
A. 5000.                 B. 6000.                         C. 7000.
(      ) 2. My favourite festival is _______.
A. Flag Day             B. Thanksgiving Day       C. the Spring Festival.
(      ) 3. It is a _______ day today.
A. big                      B. special.                      C. speak.
(      ) 4. I’ve got some _______ from China.
A. dolls.                  B. stamps.                       C. kites.
(      ) 5. _______ is a good place to go.
A. Chinese shop        B. China                         C. Chinatown
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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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