学进去-教育应平等而普惠
试题
类型:阅读选择
难度系数:0.85
所属科目:小学英语
A: Can I help you, Alice?
B: Yes, please.
A: What do you need?
B: I need some cards.
A: How many cards?
B: Two red cards and three green cards.
A: What else do you need?
B: I need some gifts.
A: Yellow gifts?
B: No, the blue gifts.
A: Here you are.
B: Thank you.
1.Alice needs some _______. (     )
A.firecrackersB.cards
2.You can see _______ cards. (     )
A.5B.3
3.The gifts are _______. (     )
A.yellowB.blue
4.Some cards are _______. (     )
A.brownB.green
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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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