题干
给下列句子选择句意相同的选项。
① The book is mine. ____ A. It's Mike's book.
② The book is Amy's. ____ B. The book is theirs.
③ It's their book. ____ C. Its' Amy's book.
④ The book is Mike's. ____ D. It's my book.
答案(点此获取答案解析）
D,C,B,A
的定义域为
，
的解集为
，
的
，则下列结论正确的是（ ）
.