学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.94
所属科目:小学英语
选词填空。
A.—School 1.________ over. Let’s go to the playground.
— 2.________
B.—3.________ is it?
—It’s 5 o’clock.
—It’s time 4._______ go home.
C.—What time is it now?
—It’s 6 o’clock. It’s time 5._______.
1. A. has            B. is                  C. are
2. A. OK                B. No              C. Thanks
3. A. What’s time       B. What time          C. How many
4. A. to                 B. for              C. is
5. A .to dinner           B. have dinner          C. to have dinner
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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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