学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选出你所听到的内容,将序号写在题前括号内。
(      ) 1. A. father                    B. friend                                  C. family
(      ) 2. A. boy                           B. blue                                  C. Bob
(      ) 3. A. here                           B. where                                  C. there
(      ) 4. A. nice                         B. nine                                  C. fine
(      ) 5. A. milk                           B. drink                                  C. talk
(      ) 6. A. 9B439                    B. 9B643                            C. 9B394
(      ) 7. A. make a wish              B. make an ice cream              C. make a cake
(      ) 8. A. You’re out.              B. You’re right.                    C. You’re eight.
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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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