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,选出你所听到的单词或短语。
(      ) 1. A. forty                           B. fourteen                         C. first
(      ) 2. A. windy                           B. weather                           C. world
(      ) 3. A. father                         B. farmer                            C. family
(      ) 4. A. Sydney                         B. snowy                              C. sunny
(      ) 5. A. library                       B. London                            C. lunch
(      ) 6. A. get up                         B. go home                           C. go to bed
(      ) 7. A.                                 B.                                         C.    
(      ) 8. A. B.                          C.    
(      ) 9. A.                                 B.                                         C.    
(      ) 10. A.                                     B.                                         C.    
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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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