学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
听音,选择你所听到的单词,将番号填入题前括号内。   
(      ) 1. A. many               B. music             C. much
(      ) 2. A. red                  B. green             C. blue
(      ) 3. A. egg                  B. big                 C. pig
(      ) 4. A. playground        B. garden            C. library
(      ) 5. A. boots                 B. book             C. look
(      ) 6. A. sheep                 B. cheap            C. soup
(      ) 7. A. how                  B. now               C. cow
(      ) 8. A. goat                  B. horse             C. hen
(      ) 9. A. really                 B. rainy               C. ready
(      ) 10. A. wind               B. window            C. windy
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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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