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

Hello, I’m Lily. I have a new bag. It is blue and white. There are many books in my bag. Look (看)! I have an orange eraser. It looks like an apple. I have a black pen and (和) three green pencils. My pencil box is very nice. It is yellow and brown.

1.I have a black and white bag. ( )
2.The orange eraser looks like an apple. ( )
3.The pen is black. ( )
4.The pencils are black and green. ( )
5.The pencil box is yellow and brown. ( )
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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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