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
读对话,用阿拉伯数字标出他们各自的年龄。
A: Hello, Tom. How old are you?
B: I'm ten years old. How old are you, Sam?
A: I'm six.
B: What about Lingling? Is she seven?
A: Yes, she is. And her brother Tim is eight. Look at this photo(照片). This is Tim, and this is Lingling. That girl is her sister Amy. Amy is six.
1.Sam___________
2.Tom___________
3.Lingling___________
4.Tim___________
5.Amy___________
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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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