学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.64
所属科目:小学英语
听问句,选择答语。(1×5)
(1)A. He watches TV every evening.
B. He helped his friend with her English.
C. He is watching TV.
(2)A. Yes, I did.
B. Yes, I am.
C. Yes, I do.
(3)A. I came back from Shanghai.
B. I came back with my parents.
C. I came back the day before yesterday.
(4)A. You’re welcome.
B. Yes, you are right.
C. Thanks, mum.
(5)A. Sorry, I don’t know.
B. Great! That’s a good idea.
C. Yes, what is it?
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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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