学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.65
所属科目:小学英语
听录音,选出你所听到的句子。每小题听两遍。
(      ) 1. A. Go to the library, read a book.     B. Go to the teachers’ office, say hello.
C. Go to the playground, play football.
(      ) 2. A. They are so long.       B. These are tomatoes.       C. Those are onions.
(      ) 3. A. It is Sarah’s skirt.       B. Is this Sarah’s skirt?       C. Is that Sarah’s shirt?
(      ) 4. A. It’s snowy outside. Let’s make a snowman.
B. It’s sunny outside. Put on your sunglasses.
C. It’s hot outside, take off your coat.
(      ) 5. A. Are these Mike’s blue pants?        B. Are those Mike’s blue shorts?
C. Where are Mike’s blue pants?
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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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