学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
Listen and choose. 听录音,根据你所听到的内容,选择适当的回应语。
(     ) 1. A. Because she walks alone at night.                                             B. Because she makes a new friend.
(     ) 2. A. Because he hurts his arm.                                                       B. Because his dog wins the race.
(     ) 3. A. Because I got a D on the English test.                                        B. Because I got an A on the English test
(     ) 4. A. Because he isn’t good at music. He doesn’t like music tests.          B. Because he wins the game.
(     ) 5. A. Because her best friend can’t come to her party.                           B. Because today is her birthday.
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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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