学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
选出你在句子中所听到的短语。
______)1. A. at night        B. at home         C. at school
______)2. A. by subway      B. by ship         C. by train
______)3. A. have breakfast   B. have lunch      C. have dinner
______)4. A. in the north of   B. in the south of    C. in the east of
______)5. A. how many      B. how much       C. how old
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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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