学进去-教育应平等而普惠
试题
类型:单选题
难度系数:0.65
所属科目:小学英语
Read and choose.(读单词,选出不同类的项。)
(        )1. A. father                           B. sister                           C. eleven
(        )2. A. thirteen                           B. nine                           C. mouse
(        )3. A. woman                           B. fish                           C. man
(        )4. A. sixteen                           B. morning                    C. afternoon
(        )5. A. seventeen                    B. kite                           C. crayon
(        )6. A. twenty                           B. orange                           C. fifteen
(        )7. A. nice                                 B. milk                           C. Coke
(        )8. A. bird                                  B. eighteen                    C. dog
(        )9. A. teacher                           B. you                           C. student
(        )10. A. fourteen                    B. good                           C. nice
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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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