减法是加法的逆运算.
故答案选:B.
He _____ a small room. _____ a nice desk in it. [ ]
A. is, There is
B. has, Has
C. have, There is
D. has, There is
影响果蔬萎蔫的因素有内在因素如:()、()、(),和环境因素如:()、()、()。