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
听单词或短语,选出你所听到的一项。
(     ) 1. A. cake                                 B. name                                C. happy
(     ) 2. A. foot                                 B. book                                C. too
(     ) 3. A. head                                 B. please                                C. three
(     ) 4. A. this                                 B. his                                       C. her
(     ) 5. A. nose                                 B. old                                       C. bag
(     ) 6. A. hello                                 B. desk                                C. leg
(     ) 7. A. panda                                 B. now                                C. down
(     ) 8. A. fine                                 B. driver                                C. kite
(     ) 9. A. morning                           B. afternoon                         C. mouth
(     ) 10. A. blackboard                           B. bird                                C. birthday
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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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