学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.65
所属科目:小学英语
Sally: Hi, Lynn. 1.
Lynn: Who is he? David?
Sally: 2.. He has glasses.
Lynn: Is he Peter?
Sally: Yes. You’re right. I have a new bedroom, too.
Lynn: 3.
Sally: A bed, a desk, a chair, a computer and some toys.
Lynn: 4.
Sally: Yes, it’s on my desk.
Lynn: 5.
Sally: They are in my toy box.
A.No, he is short and fat.
B.Where are the toys?
C.Do you have a phone?
D.Really? What’s in it?
E.I have a new friend.
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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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