下列哪种肠梗阻多见于幼儿
A.肠道闭锁B.肠道狭窄C.肠套叠D.肠扭转E.肠内肿瘤
参考答案:C
肾移植术前,组织配型检查项目不含
A.ABO血型
B.HLA抗原
C.3P试验
D.混合淋巴细胞培养
E.淋巴细胞毒性试验
It be difficult to get a train ticket during traditional Chinese Spring Festival this year because there are many ticket windows.
A.mustn't
B.ought to
C.needn't
D.can't