已知一个多项式3x2+9x与另一个多项式的和等于3x2+4x-1,则这个多项式是[ ]
A. -5x-1
B. 5x+1
C. -13x-1
D. 13x+1
答案:A
Make sentences. 连词成句,注意标点符号。
1. are doing what you
2. is her doing what mother
3. go the Children's to do want to Center you
4. I to mom can speak your please
5. brother doing is homework my
最有助于诊断肠结核的病理改变是
A.黏膜弥漫性炎症B.节段性炎症C.匍行沟槽样溃疡D.干酪性肉芽肿E.非干酪性肉芽肿