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,根据短文内容,回答问题。(听两遍)
(     ) 1. What is Jack doing?
A. He is having a picnic near the school.       B. He is having a picnic in the park.     C. He is flying a kite in the park.
(     ) 2. What are the ducks doing?
A. They're swimming on the pond.     B. They're swimming in the lake.       C. They're eating sandwiches.
(     ) 3. Who is Tom?
A. He is Jack's friend.       B. He is Jack's elder brother.       C. He is Jack's little brother.
(     ) 4. What is Tom doing?
A. He is drinking a cola.       B. He is drinking milk.        C. He is drinking juice.
(     ) 5. Is Jack going to drink a cola?
A. Yes, he is.     B. No, he isn't.        C. We don't know.
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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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