学进去-教育应平等而普惠
试题
类型:任务型阅读
难度系数:0.65
所属科目:小学英语
读对话,判断正(T)误(F)。
   
Betty: Li Na, how many people are there in your family?
Li Na: Six. My grandpa, grandma, dad, mom, sister and I.
Betty: Does your dad have a big nose?
Li Na: Yes, he does.
Betty: Does your mom have black hair?
Li Na: No. She has yellow hair.
1.There are six people in Li Na’s family. (     )
2.Li Na has a brother. (     )
3.Li Na has a sister. (     )
4.Li Na’s mom has black hair. (     )
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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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