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,选出听到的单词或句子,读两遍。
(      ) 1. A. map                                        B. meet
(      ) 2. A. cry                                          B. fly
(      ) 3. A. always                                     B. sometimes
(      ) 4. A. draw                                        B. jump
(      ) 5. A. blow                                        B. sleep
(      ) 6. A. Helen couldn't hear.                    B. Helen couldn't see.
(      ) 7. A. What do you want to eat?             B. When do you want to eat?
(      ) 8. A. They are singing and dancing.       B. They are talking and singing.
(      ) 9. A. It will be rainy in Beijing.             B. It will be sunny in Beijing.
(      ) 10. A. Please stand up.                         B. Please look at the picture.
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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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