学进去-教育应平等而普惠
试题
类型:填空题
难度系数:0.64
所属科目:小学英语
从下列单词中选择恰当的词,用正确的形式填入句中。
once, water , teach , wash , do , help , watch
[[QOrDeR]]Doing chores ___children become responsible.
【小题2】In America, many parents ___their children to help with chores.
【小题3】My mother ___the dishes every evening.
【小题4】Do you like ___chores?
【小题5】I often ___TV on Saturdays.
【小题6】We clean our classroom ___ a day.
【小题7】Look at the boys. They ___the plants and flowers.
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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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