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学进去-教育应平等而普惠
试题
类型:任务型阅读
难度系数:0.65
所属科目:小学英语
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There is a big forest zoo in the Dalian. There are lots of animals. Tigers are twenty. Lions are ten. Bears are twelve. Wolves are thirty. How many wild (野生的) animals? It’s seventy-two. Do you know the numbers about the animals?
1.How many wild animals? (   )
A.eightyB.seventyC.seventy-two
2.How many tigers and lions? (   )
A.20 + 10 = 30B.20 + 12 = 32C.20 + 30 = 50
3.How many bears and wolves? (   )
A.10 + 30 = 40B.12 + 30 = 42C.20 + 30 = 50
4._____________________________________________
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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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