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
听录音,选答案。听下面5段对话或独白,每段对话或独白后有1个小题,从题中所给的A、B、C三个选项中选出最佳答案。
(      ) 1. The music room is on the ________ floor.
A. one                           B. first                           C. second
(      ) 2. It’s time to ________.
A. go to bed                    B. get up                           C. go home
(      ) 3. It’s ________ today.
A. cool                           B. warm                           C. hot
(      ) 4. They have 8 ________.
A. horses                           B. ducks                           C. hens
(      ) 5. This red scarf is ________.
A. yours                           B. mine                           C. my sister’s
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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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