学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选出你所听到的单词,短语或句子,读两遍。
(     ) 1. A. picnic                    B. magic                    C. clock
(     ) 2. A. every                    B. each                    C. both
(     ) 3. A. ants                           B. aren't                    C. can't
(     ) 4. A. a car show              B. a shoe factory       C. a nice park
(     ) 5. A. write letters              B. carry bags              C. tell stories
(     ) 6. A. There are too many people on the bus. It's too full.
B. They all want to Beijing to visit the Palace Museum in a few days.
C. There were a lot of people on Tian'anmen Square on Monday evening.
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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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