学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.40
所属科目:小学英语
听短文,根据短文内容选择正确的选项,将其序号填在题前的括号里。短文读两遍。
1.Lucy’s father is a ________.    (    )
A.doctorB.farmerC.cook
2.He is________.(    )
A.tallB.short and strongC.tall and strong
3.Lucy’s mother is a________.(    )
A.maths teacherB.Chinese teacherC.English teacher
4.Lucy’s mother likes________.(    )
A.fish and vegetablesB.beefC.noodles
5.Lucy can________.(    )
A.clean the blackboardB.clean the windowC.clean the bedroom
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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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