学进去-教育应平等而普惠
试题
类型:任务型阅读
难度系数:0.40
所属科目:小学英语
萨拉为家人购买了一些衣物及水果,她都买了些什么?价格分别是多少?写一写。(价格用数字表示)    I by a dress for my sister. It's sixty—eight yuan. I buy a pair of shorts for my brother. They're thirty—five yuan. Whose shoes are these? They're for my father. They're fifty—six yuan. I want to buy some apples for my mother. How much are they? They are thirteen yuan. They're delicious.
(1)________ yuan
(2)________ yuan
(3)________ yuan
(4)________ yuan
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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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