学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.65
所属科目:小学英语
听录音,选出你所听到的内容。(听两遍)
_______) 1.  A. clean            B. think                C. mean
_______) 2.  A. poster            B. protect            C. plastic
_______) 3.  A. laugh            B. through            C. flew
_______) 4.  A. plan                B. plant                C. plane
_______) 5.  A. wood            B. could                C. food
_______) 6.  A. cloudy            B. rainy                C. sunny
_______) 7.  A. brought            B. caught            C. thought
_______) 8.  A. look for            B. look after           C. look out   
_______) 9.  A. sit down            B. cut down            C. put down
_______)10.  A. fashion show         B. Palace Museum      C. Summer Palace
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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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