学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.65
所属科目:小学英语
判断下列对话是否正确,正确的打“√”,错误的打“×”
(_______) 1.A:What did you eat?                B:I ate some cakes.
(_______) 2.A:What did you buy?                B:I buy some pictures.
(_______) 3.A:Did Sam help mother?             B:No, he didn’t.
(_______) 4.A:Did you eat a banana?            B:No, I don’t.
(_______) 5.A:What did the friends drink?      B:No, they didn’t.
(_______) 6.A:Did you help your mother?        B:Yes, I did.
(_______) 7.A:Did they listen to music?        B:Yes, they did.
(_______) 8.A:How old were you in the photo7   B:I’m four.
(_______) 9.A:Is your hair long?               B:Yes, it is.
(_______) 10.A:Who are they?                   B:It was their birthday.
(_______) 11.A:Where are you from?             B:I’m from Chinese.
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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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