学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.94
所属科目:小学英语
选不同类单词, 将其序号填在( )里。(10分)
(1)A. morning     B. afternoon    C. night       D. breakfast
(2)A. Monday      B. week         C. Sunday     D. Tuesday
(3)A. stone       B. key          C. soft        D. watch
(4)A. weather     B. sun          C. snow       D. wind
(5)A. shirt        B. coat         C. wear       D. dress
(6)A. tidy        B. sweep        C. wash       D. housework
(7)A. congee      B. apple        C. rice        D. bread
(8)A. mango       B. melon        C. apple       D. coke
(9)A. clever      B. star          C. square      D. circle
(10)A. spring     B. summer       C. season     D. winter
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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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