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,选出你所听到的单词,每个单词读两遍。
(      ) 1. A. gloves               B. shorts                    C. shoes
(      ) 2. A. size                    B. nine                      C. nice
(      ) 3. A. try on                 B. how much               C. of course
(      ) 4. A. eighty                 B. forty                      C. eighteen
(      ) 5. A. expensive            B. pretty                    C. cheap
(      ) 6. A. skirt                  B. scarf                      C. shirt
(      ) 7. A. just                    B. wait                       C. jacket
(      ) 8. A. sunglasses            B. glasses                  C. umbrella
(      ) 9. A.   how much        B. how old                  C. how many
(      ) 10. A. dollar               B. sale                         C. more
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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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