学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.64
所属科目:小学英语
听录音,选择所听到的单词(每小题读两遍10分)
(1)A. feel            B. five         C.fever 
(2)A. Sunday           B. Science      C.study
(3)A. at once          B. at nine      C.at school
(4)A. trick            B. tree        C.try
(5)A. toothache        B. backache    C.headache
(6)A. fever            B. cold         C. earache
(7)A. stay at school   B. stay in bed  C.stay at home
(8)A. 4810234          B. 8410234      C. 4801234
(9)A. I'm sorry to hear that.
B.I'm sad to hear that.
C.I'm happy to hear that.
(10)A. Take a lot of rest.
B.Take some notes.
C.Take some medicine, please. 
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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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