学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.65
所属科目:小学英语
情景交际。将序号填在横线上(有一项是多余的)。
A. What happened(发生)to her?
B. Where did she go?
C. When was Helen Keller born.
D. Why was she famous?
E. Did she have a teacher?
F. Where was Helen Keller born?

A: 1. ______
B: She was born in America.
A: 2. ______
B: She was born in 1880.
A: 3. ______
B: She became blind and deaf. She couldn’t see or hear.
A: 4. ______
B: Yes, she did. The teacher drew letters in her hand, and Helen learned to speak.
A: 5. ______
B: She wrote a book about herself.
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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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