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,选出所听内容包含的单词。每小题读两遍。
(       ) 1. A. raincoat                     B. umbrella                            C. ruler
(       ) 2. A. have a cage                    B. have a basket                     C. have a box
(       ) 3. A. clothes                            B. pencils                                 C. things
(       ) 4. A. food                            B. fish                                  C. soup
(       ) 5. A. small                            B. young                                   C. tall
(       ) 6. A. dinner                           B. delicious                           C. dictionary
(       ) 7. A. jeans                           B. jacket                                  C. coat
(       ) 8. A. cold                           B. going                              C. holding
(       ) 9. A. nice and thin                    B. big and thin                           C. nice and thick
(       ) 10. A. fish and chicken              B. fish, beef and milk              C. fish, beef and vegetable
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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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