It
A.was | B.is | C.were |
A.visits | B.visit | C.visited |
A.winter | B.summer | C.autumn |
A.wasn’t | B.didn’t | C.weren’t |
A.eat | B.ate | C.eats |
A.good | B.well | C.sick |
A.called | B.call | C.calls |
A.comes | B.came | C.come |
A.talk | B.talks | C.talked |
A.happy | B.sad | C.angry |
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