15+2=5-2(5+2)(5-2)=5-2.
故答案为5-2.
--There is little coffee in the bottle,____________?
A.is there
B.isn’t there
C.is it
D.isn’t it
加油员上班时应该()。
A、严格遵守岗位职责
B、离岗
C、串岗
D、看书学习