学进去-教育应平等而普惠
试题
类型:填空题
难度系数:0.65
所属科目:小学英语
根据短文,选择合适的单词填入短文下面的横线中。
swimming  near  beautiful  picture  flying  are

It’s spring now. The park is very beautiful. Look, the trees are green and the flowers are red. A bird is (1) ______ in the blue sky. Some ducks are (2) ______ in the big lake. There (3) ______ two boys in the small boat. They wear yellow shirts. One girl is painting (4) ______ the lake. What’s in her (5) ______? Oh, it’s a rainbow. How (6) ______ it is!

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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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