学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
Listen and choose. 听对话,选择正确的答案。
(      ) 1. Chen Jie’s family has ______ people.
A. two                     B. three                     C. my parents and me
(      ) 2. I’d like ______, please.
A. Here you are.        B. some noodles        C. some vegetables
(      ) 3. Lucy is ______.
A. tall and strong        B. tall and thin        C. short and thin
(      ) 4. The blue pencil box is ______.
A. on the floor        B. on the desk        C. it isn’t
(      ) 5. There is ______ in the schoolbag.
A. a notebook        B. blue and white        C. an English book and two toys
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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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