右半结肠经横结肠上、下两途径切除术符合恶性肿瘤手术切除原则。
参考答案:对
I am tired now. I have to______ to have a rest.[ ]
A. get
B. stop
C. take
D. pay
手足口病的病原体是()
A.HSV
B.VZV
C.HPV
D.MCV
E.柯萨奇病毒