学进去-教育应平等而普惠
试题
类型:阅读选择
难度系数:0.65
所属科目:小学英语

My school is very big. There are sixteen classrooms. There are three hundred students in it. I’m in Class 2, Grade 4. There are two doors and six windows in our classroom. On the teacher’s desk, there is a computer. We have twenty­-five desks and fifty chairs. There’re thirty boys and twenty girls in our class. We have three teachers. They are a Chinese teacher, an English teacher and a maths teacher. We all love our teachers.

1.I am in Class ________ Grade ________. (  )
A.two; fourB.Four; TwoC.Two; Four
2.There is (are) ________ on the teacher’s desk. (  )
A.a computerB.a TVC.two doors
3.We have ________ chairs and ________ desks. (  )
A.fifty; twenty-­fiveB.twenty-­five; fiftyC.twenty­-fifty; fifty
4.There’re ________ students in our class. (  )
A.fortyB.fiftyC.six
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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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