Lesson 1 (第一课) in unit 9
A.asks | B.tells | C.fixes |
A.is | B.are | C.am |
A.in | B.at | C.on |
A.does | B.do | C.to do |
A.get | B.gets | C.getting |
A.early | B.late | C.sorry |
A.do | B.does | C.to do |
A.for | B.with | C.to |
A.In | B.On | C.At |
A.week | B.year | C.day |
同类型试题
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
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