学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.85
所属科目:小学英语
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(   ) (1) A.please               B. plate           C. plane
(   ) (2) A. blackboard         B. cupboard       C. cup
(   ) (3) A. bear              B. pear           C. ear
(   ) (4) A. train              B. try            C. tree
(   ) (5) A. spoon             B. sweet          C. school
(   ) (6) A. where             B. there           C. here
(   ) (7) A. breakfast           B. bread          C. brother
(   ) (8) A. thses books          B. many books     C. their books
(   ) (9) A. a glass of milk       B. a carton of milk  C. a bottle of water
(   ) (10) A. Where’s the fork?   B. That’s a fork.    C. There’s a fork.
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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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