学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听问句,选答语。请听下面5个问句,每个问句有最佳回答语,从题中所给的A,B,C三个选项中选出最佳选项。听完每个问句后,你将有10秒钟的时间回答有关小题和阅读下一小题。每个问句读两遍。
(        ) 1. A. There are twelve.   B. I can see twelve.   C. Yes, I can.
(        ) 2. A. Yes, I am.          B. Yes, we do.               C. No, we have one.
(        ) 3. A. There are ten boys.        B. They are picking up bottles     C. Yes, they are.
(        ) 4. A. Yes, it is            B. Good idea                 C. You can sit here.
(        ) 5. A. There are about twenty.     B. Yes, there are some.       C. About half a kilo.
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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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