听录音，选出听到的句子，将答案写在题前括号内。每小题读两遍。( ) 1. A. Are t

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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，选出听到的句子，将答案写在题前括号内。每小题读两遍。
(      ) 1. A. Are they near the desk?        B. Are they under the desk?
(      ) 2. A. Turn on the light.        B. Put up the picture.
(      ) 3. A. My friend has blue glasses.        B. My friend has blue shoes.
(      ) 4. A. Would you like some noodles?        B. What would you like?
(      ) 5. A. Let me help you.        B. Help yourself.

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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

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2019-09-19

用户名称

2019-09-19

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