______边形的内角和与外角和相等．
根据题意，得
（n-2）•180=360，
解得n=4．
所以四边形的内角和与外角和相等．
The employers often give the job to ________they believe have work experience with strong sense of duty.
A．whichever
B．those who
C．who
D．whomever
经高压灭菌后的物品一般可保留
A．3天
B．5天
C．7天
D．10天
E．14天
