—______, but please give it back by Saturday.
A:I'm sorry
B:Of course
C:Certainly not
D:No, thanks
①井冈山精神 ②长征精神
③延安精神 ④“两弹一星”精神
A.3xy与﹣xy是同类项;B.0不是单项式;C. 1a ﹣b是一次二项式;D.3a2﹣4a+1的项是3a2,4a,1.
Uncle Tom will come to visit _____ next Saturday.