学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
选出你所听到的句子。
_____) 1. A. I have a fever.
B. I have a cold.
C. I have a cough.
_____) 2. A. Here’s a get-well card for you.
B. Here’s a teddy bear for you.
C. Here are some chocolates for you.
_____) 3. A. I have a headache.
B. I have a toothache.
C. I have a stomachache.
_____) 4. A. I’ll help you with your maths.
B. I’ll help you with your science.
C. I’ll help you with your Chinese.
_____) 5. A. You should go to a doctor.
B. You should drink more water.
C. You should take a good rest.
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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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