下列哪项不属于幼儿急疹的皮疹特点()
A.疹退后无脱屑
B.皮疹以躯干、腰部、臀部为主
C.疹退后无色素沉着斑
D.热盛出疹
E.皮疹出现1~2天后即消退
参考答案:D
It seems that oil______from this pipe for some time.We’ll have to take the machine apart to put it right.
A.had leaked
B.is leaking
C.leaked
D.has been leaking
试述足迹的特征。