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,选择你所听到的内容。每小题听两遍。
(      ) 1. A. angry                  B. afraid                 C. sad
(      ) 2. A. writer                  B. dancer               C. police officer
(      ) 3. A. evening               B. tonight               C. tomorrow
(      ) 4. A. left                      B. right                  C. straight
(      ) 5. A. post office             B. cinema               C. hospital
(      ) 6. A. dancing                 B. playing               C. writing
(      ) 7. A. plane                    B. train                    C. ship
(      ) 8. A. dictionary             B. comic book          C. word book
(      ) 9. A. scientist                 B. pilot                    C. coach
(      ) 10. A. see a doctor          B. stay healthy          C. slow down
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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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