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( )（1）A. BEC B. BDC C. DBC
( )（2）A. efi B. ife C. ifg
( )（3）A. father B. brother C. mother
( )（4）A. family B. funny C. really
( )（5）A. come in B. come on C. welcome
( )（6）A. dad B. dog C. duck
( )（7）A. mom B. man C. me
( )（8）A. grandpa B. grandma C. grandmother
( )（9）A. great B. green C. grandpa
( )（10）A. she B. he C. we
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
