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
听音,选出你听到的字母或单词。

(      ) 1.A. c-a-p       B. f-a-t                             C. m-a-p
(      ) 2. A. B-O-Y                 B. T-O-Y                             C.B-I-G
(      ) 3. A. desk                    B. buy                                C. dad
(      ) 4. A. boy                  B. big                      C. buy
(      ) 5. A. eight                  B. eighteen                           C. eleven
(      ) 6. A. 12                       B. 2                                     C. 20
(      ) 7. A. banana                 B. ball                                C. strawberry
(      ) 8. A. father                  B. family                           C. friend
(      ) 9. A. children               B. chair                               C. China
(      ) 10. A. short                    B. small                               C. Sister
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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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