学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
Listen and choose. 单项选择,请把序号填在题前括号里。
_____) 1.
A. Four.      B. Three     C. Two.
_____) 2.
A. It’s a butterfly.
B. It’s a bee.
C. It’s a ladybird.
_____) 3.
A. It’s star.
B. It’s a star.
C. It’s a square.
_____) 4.
A. He’s old.
B. She’s my mother.
C. He’s my grandfather.
_____) 5.
A. It has six legs.
B. It has eight legs.
C. It has ten legs. 
_____) 6. A. A duck.        B. A dog.           C. A hen.
_____) 7. A. It’s green.   B. It’s blue.     C. It’s white.
_____) 8. A. It’s a rubber.B. It’s a ruler.   C. It’s a desk.
_____) 9. A. A rabbit.      B. A mouse.         C. A cat.
_____) 10. A. The pig.      B. The chick.       C. The duck.
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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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