1.cheap
A./e/ | B./ə/ | C./eɪ/ | D./i:/ |
A./ʌ/ | B./əu/ | C./ə/ | D./ɒ/ |
A./ʊ/ | B./ju:/ | C./u:/ | D./ʌ/ |
A./s/ | B./z/ | C./ɪz/ | D./k/ |
A./tʃ/ | B./dʒ/ | C./θ/ | D./ð/ |
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