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1．I felt
2．The little boy said, "I am old enough to take good care of
3．Our team lost the game because we played very
4．In America, 95% of pet owners think of their animals as family
5．A team of climbers from Peking University reached the top of the world's
6．Scientists around the world are working to
7．Have you ever cut your finger on the edge (边缘) of a book page? The small cut on your finger is so
8．There are about 6,000' languages that are spoken around the world, but 43% of them are dying out. If no
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
