学进去-教育应平等而普惠
试题
类型:其他
难度系数:0.65
所属科目:小学英语
根据所描述的内容,选择合适的英语单词。
tomorrow   e-friend   Australia   China   US   water
1.It’s a kind of liquid, no colour, no taste, we need it in our life. (_____)
2.He or she is your friend, you don’t meet each other, you just send e-mails with him or her. (_____)
3.The capital (首都) of which is Beijing. (_____)
4.The day after today. (_____)
5.The capital of which is Sydney. (_____)
6.The United States of America. (_____)
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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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