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
听录音,根据对话内容,选择正确的答案,每个小题读两遍。
(      ) 1. Mary's mother is a _______.
A. teacher                                 B. farmer                                        C. doctor
(      ) 2. Dad will be home at _______.
A. half past seven                       B. seven o'clock                                C. a quarter to seven
(      ) 3. They will go to school _______.
A. on foot                                   B. by school bus                              C. by taxi
(      ) 4. Mary's father goes to work at _______.
A. half past five every morning       B. twenty past five every morning       C. a quarter to five in the afternoon
(      ) 5. Today is _______.
A. Mother's Day                           B. Lily's mum's birthday                    C. Children's Day
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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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