学进去-教育应平等而普惠
试题
类型:选词/短语填空
难度系数:0.65
所属科目:小学英语
读一读,选词填空。
am   is   are   was   were
1.My sister________short, but now she ________tall.
2.It ________8 o'clock. I ________having an English class.
3.They________in Shanghai last week. Now they________in Changchun.
4.一 ________Alice in the hall?
一No. She ________in the hall. But now she________in the classroom.
5.They ________tadpoles(蝌蚪)when they________very young. Now they________frogs.
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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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