A:I suppose so
B:I’d love to
C:I think so
D:I like it
已知:RCHO →CHCl3 (﹣R表示烃基)
Where ______ the cat? ( )
①Mum hello family a thin girl your mother Mr Wang
②Is he a fat teacher? No,he isn't. He's a thin teacher.
造成“世界屋脊”和“鱼米之乡” 农业生产差异的根本原因是( )