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,选出你所听到的选项,将序号写在题前括号内,听两遍。
(     ) 1. A. xw       B. xv       C. sv
(     ) 2. A. JM       B. JN       C.GN
(     ) 3. A. ily       B. irl       C. rai
(     ) 4. A. is       B. this       C. it’s
(     ) 5. A. friend       B. father       C. family
(     ) 6. A. white       B. what       C. that
(     ) 7. A. shirt       B. skirt       C. T-shirt
(     ) 8. A. new       B. nice       C. now
(     ) 9. A. that doll       B. that ball       C. this ball
(     )10. A. What about you?       B. What colour?       C. Would you like it?
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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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