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
听句子,选单词或短语。
(     ) 1. A. always B. usually C. sometimes
(     ) 2. A. sad B. afraid C. happy
(     ) 3. A. hospital B. bookstore C. restaurant
(     ) 4. A. fisherman B. postman C. policeman
(     ) 5. A. next day B. today C. tomorrow
(     ) 6. A. by ship B. by sled C. by ferry
(     ) 7. A. tell stories B. read a poem C. read books
(     ) 8. A. turn left B. go along C. turn right
(     ) 9. A. run and swim B. running and swimming C. runs and swims
(     ) 10. A. make a snowman B. wear warm clothes C. do more exercise
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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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