机组检修后,装配顺序一般可按(),先内后外的原则进行。
A、先难后易,先精密后一般
B、先易后难,先一般后精密
C、先上后下,先整体后拆零
D、先中心,后外围
参考答案:A
尿中胆红素检测阴性的黄疸类型是()
A.溶血性黄疸
B.急性黄疸性肝炎
C.原发性胆汁性肝硬化
D.病毒性肝炎
E.胆管癌
The research project has only been under way for three months, so it's too early to________its success. [ ]
A. conclude
B. evaluate
C. indicate
D. reveal