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. 听录音,选择合适的应答语。
(      ) 1. A. It’s in the study.        B. He’s in the kitchen.                            C. No, she isn’t.
(      ) 2. A. It’s black.              B. Some storybooks.                            C. I have a schoolbag.
(      ) 3. A. Thank you.              B. Excuse me.                                  C. Let’s go and see!
(      ) 4. A. Help yourself.              B. No, thanks. I can use chopsticks.        C. Thanks.
(      ) 5. A. Yes, he is.              B. She is a nurse.                                  C. He is a cook.
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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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