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:0.65
所属科目:小学英语
听录音,选出你所听到句子中的含有的单词,将其字母编号填在题前的括号内。
(      ) 1. A. first floor                  B. second floor                 C. third floor
(      ) 2. A. breakfast                  B. lunch                                  C. dinner
(      ) 3. A. rainy                             B. sunny                           C. snowy
(      ) 4. A. photos                      B. tomatoes                      C. potatoes
(      ) 5. A. these                             B. those                                 C. this
(      ) 6. A. skirt                              B. shirt                            C. shorts
(      ) 7. A. who                              B. whose                           C. what
(      ) 8. A. socks                             B. gloves                         C. scarf
(      ) 9. A. eighteen                      B. eighty                           C. eight
(      ) 10. A. England                    B. Chinese                           C. English
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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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