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
听短文,选出正确答案。
第一篇:
(      ) 1. Where were Amy and Lingling yesterday?
A. They were at school.       B. They went out.     C. They were at home.
(      ) 2. What was the TV show about?
A. It was about cats.     B. It was about elephants.     C. It was about dogs.
(      ) 3. What do elephants like?
A. They like bananas and meat.
B. They like meat and food from trees.
C. They like bananas and food from trees.
第二篇:
(      ) 4. Who is Dragon Boat Festival about?
A. Chang’e.       B. Qu Yuan.       C. Shen Nong.
(      ) 5. What do people eat on Dragon Boat Festival?
A. Mooncakes.       B. Dumplings.       C. Zongzi.
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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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