学进去-教育应平等而普惠
试题
类型:改错
难度系数:0.94
所属科目:小学英语
选出下列句子中错误的一项,并在横线上改正。
(_____)1.(A)Let go and(B)see(C)her.     _______
(_____)2.(A)She isn't(B)feel(C)well today. ______ 
(_____)3.(A)I try to(B)do(C)me best each day.  ______
(_____)4. Tom(A)usually(B)go to school(C)at 7:40. ______
(_____)5.(A)Let's say(B)Hello to(C)him.   ______
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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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