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:0.85
所属科目:小学英语
听对话,选择正确的选项。
(     ) 1. Danny cleans the ______.
A. desks       B. blackboard       C. chairs
(     ) 2. Lucy’s aunt is a ______.
A. doctor       B. driver       C. nurse
(     ) 3. The puppy is in the ______.
A. kitchen       B. study       C. living room
(     ) 4. Tom can use ______ for noodles.
A. a fork       B. a spoon       C. chopsticks
(     ) 5. —How many books are there in the schoolbag?   —______
A. Three.       B. Four.C. Five.
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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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