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,选出你所听到的内容。(听两遍)
(      ) 1. A. housework             B. homework             C. hard work
(      ) 2. A. let             B. late              C. net
(      ) 3. A. but             B. cuts             C. puts
(      ) 4. A. sleeps             B. sleepy              C. sleeping
(      ) 5. A. clever             B. never             C. fever
(      ) 6. A. clean and tidy             B. get up early             C. messy and dirty
(      ) 7. A. brush my teeth             B. put things in order       C. finish my homework
(      ) 8. A. a good habit             B. some good habits       C. some bad habits
(      ) 9. A. my birthday presents        B. help my parents       C. a parrot show
(      ) 10. A. in the evening             B. at last             C. at night
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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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