学进去-教育应平等而普惠
试题
类型:单选题
难度系数:0.65
所属科目:小学英语
找出不同类的单词,把其大写字母编号写在题前的括号内。
(      )1.A.father                  B.family               C.mother
(      )2.A.picture                 B.brother             C.sister
(      )3. A.fine                    B.good                 C.teacher
(      )4.A.what                  B.who                  C.that
(      )5.A.head                  B.hair                  C.wash
(      )6.A.I                       B.my                    C.your
(      )7.A.friend                 B.picture               C. meet
(      )8.A.boy                    B.girl                    C.that
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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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