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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
听录音,选择。
1. A. tired    B. bored     C. quiet      D. goal (______)
2. A. know               B. now             C. loud        D. arouse (______)
3. A. length             B. weight          C. age         D. size (______)
4. A. 13cm taller        B.30cm shorter     C. 40cm longer (______)
5. A. 15 years old       B. 50 years old    C.5 years older (______)
6. A. 10 more teeth      B. 1 more feet     C. 100 meters (______)
7. A. I fly kites.        B. I flew kites.    C. I make kites. (______)
8. A. They are taking a trip.  B. They are going on a trip. (______)
9. A. My bed is 220cm long.  B. My room is 200 square meters. (______)
10. A. Amy failed her math test so she is sad. B. Lily failed her English test, so she is feeling bad. (______)
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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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