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,选出你所听到的单词或短语。内容读三遍。
(      ) 1. A. Fridays            B. fine days             C. five days
(      ) 2. A. cooking          B. reading               C. speaking
(      ) 3. A. park               B. part                      C. playground
(      ) 4. A. try                  B. shy                    C. my
(      ) 5. A. run                 B. red                    C. robots
(      ) 6. A. third               B. thirsty                  C. thirty
(      ) 7. A. sunny day        B. Sunday                 C. three days
(      ) 8. A. drink tea        B. eat meat               C. meet you
(      ) 9. A. Unit 2             B. Unit 1                  C. Unit 3
(      ) 10. Page 13            B. Page 30             C. Page 20
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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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