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
听五组小对话,根据对话内容选择正确的答案。
(     ) 1. Tom wants ______.
A. chicken and rice               B. a hamburger and milk        C. a hamburger and cola
(     ) 2. Amy arrived at school at ______.
A. 7:00                                   B. 7:30                                   C. 7:45
(     ) 3. ______ helps John.
A. Dad                                   B. Mum                                   C. Dictionary
(     ) 4. Daming is ______.
A. riding a bike                     B. reading a book                     C. listening to music
(     ) 5. He buys ______ pencil(s) and ______ pen(s).
A. Three; one                            B. four; two                            C. three; two
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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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