学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.85
所属科目:小学英语

Sometimes the weather is happy. When it’s 1., it tells the sun to play. I can go outside and play with my friends. We play with balloons, dolls and toy planes. Then we eat 2. under a tree. What a fun day! Sometimes it is sad. When it is sad, it tells the clouds to rain. It’s 3. outside and I have to stay at home to do homework. It’s not 4.. Sometimes the weather is angry. When it’s angry, it will call for lightning and 5.. I’m afraid of these things, so I get in bed and hug my teddy bear.

A.windB.rainingC.funD.fruitE.happy
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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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