学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.64
所属科目:小学英语
Listen and judge
你将听到一段独白,根据独白内容判断下列句子的对错。对的请在题前的括号内打“√”,错的打“×”。该对话将读两遍。
(   )(1)Sarah went to Shanghai by train.
(   )(2)She was not happy in Shanghai.
(   )(3)She went shopping on the first day.
(   )(4)She bought some presents for her parents.
(  )(5)She came back home on the third day.
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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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