Do you still remember the chicken farm _

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问题选择题

Do you still remember the chicken farm _____ we visited three months ago?

A. where
B. when
C. that
D. what

答案

答案：C

选择题

—"What does your uncle like?"

—"_______." [ ]

A. He is very tall

B. He's like a doctor

C. He likes football

D. He isn't very old

填空题

关系模型的( )是对关系的某种约束条件。