学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.64
所属科目:小学英语
阅读短文,判断正(T)误(F)。
When you walk on the road, you must be careful. There are lots of cars and buses now. They are very beautiful, but they are also very dangerous. We must obey(遵守)the traffic(交通)rules:
1. Drive, ride or walk on the right side of the road.
2. When the lights are red, we must stop.
3. When the lights are yellow, we must wait.
4. When the lights are green, we can cross.
(  ) 1. We must obey the traffic rules when we walk on the road.
(  ) 2. I hold(抓住) my mother's hand. I needn't(不需要) obey the traffic rules.
(  ) 3. We must walk on the left side of the road.
(  ) 4. When the lights are yellow, we can cross.
(  ) 5. When the lights are red, we can't cross.
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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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