分解因式:5x2-20=______.
5x2-20,
=5(x2-4),
=5(x+2)(x-2).
故答案为:5(x+2)(x-2).
男性,36岁,搬运工人,诊断为腹股沟斜疝,疝修补术后,恢复工作的时间是()
A.术后至少2周
B.术后至少4周
C.术后至少2个月
D.术后至少3个月
E.术后至少6个月
However frequently ,the works of Shakespeare always attract many peo - ple.
A.performed
B.performing
C.being performed
D.to be performed