学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.65
所属科目:小学英语
从下列选项中,选择一个不同于其它三项的单词。
(   ) 1. A. fifteen                   B. sixteen                       C. fourteen                  D. pear
(   ) 2. A. cool                        B. rubber                     C. wonderful                 D. nice
(   ) 3. A. pineapple                B. ruler                       C. pen                              D. rubber
(   ) 4. A. apple                       B. play                          C. sleep                           D. talk
(   ) 5. A. balls                     B. panda                      C. pears                        D. cakes
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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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