They are twins. They look _____.[ ]
A.same
B.like
C.after
D.the same
答案:D
肺栓塞最常见的栓子来源于下肢深静脉血栓,其次有右心房和右心室血栓、感染性血栓、瘤栓、脂肪栓等。()
干旱的防御措施有哪些?