学进去-教育应平等而普惠
试题
类型:按要求填空
难度系数:0.65
所属科目:小学英语
读—读,选出适当的单词完成句子,将字母代号写在前面的横线上,每词限用—次。
A. never    B. computer    C. sometimes    D. e-mails    E. Internet    F. often
1.The girls _____________ go to the zoo and see animals.
2.There is a big _____________ lab in our classroom building.
3.—How _____________ does Peter go to Nanjing? 
—Once a year.
4.In the past, we usually write letters to each other, but nowadays we write _____________.
5.I am afraid of water. So l _____________ swim in the water.
6.Jimmy has a lot of friends. He always talks to them on the _____________.
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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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