学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,根据对话内容,回答问题。(听两遍)
(     ) 1. What is Sam doing?
A. He is eating.       B. He is playing hide-and-seek.       C. He is wearing a hat.
(     ) 2. Why is Lucy wearing a new dress?
A. Because she's going to dance.       B. Because she's going to the theatre.     C. Because she's going to have a party.
(     ) 3. What did Ben do in the afternoon?
A. He played baseball with his friends.       B. He played basketball with his friends.     C. He played football with his friends.
(     ) 4. What is Peter going to do?
A. He is going to swim.       B. He is going to play baseball.       C. He is going to play basketball.
(     ) 5. Where's the cat?
A. It's behind Daming.       B. It's behind Lingling.       C. It's under the tree.
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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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