急性湿疹的临床特点不包括（）。
A.起病急，病程短
B.可有渗出、糜烂
C.可发生于身体任何部位
D.无全身症状
E.可发展成亚急性和慢性湿疹
参考答案：D
Mrs. White found her husband surrounded by letters and papers and _____ very worried. [ ]
A. look
B. looks
C. looking
D. to look
猪的双重配种是指在母猪的一个发情周期内，用同一头公猪先后配种两次。
