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（1）A. family B. friend C. father
（2）A. plate B. play C. player
（3）A. math B. much C. many
（4）A. music B. milk C. Mike
（5）A. teacher B. picture C. parents
（6）A. phone B. photo C. people
（7）A. on B. an C. no
（8）A. 15 B. 50 C. 35
（9）A. 28 B. 8 C. 18
（10）A. BDP B. DPT C. BPD
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
