在带电作业中,其安全性常以带电作业的()和带电作业的()来进行衡量。
参考答案:危险率;事故率
You ____ him so closely; you should have kept your distance.
A.shouldn't follow
B.mustn't follow
C.couldn't have been following
D.shouldn't have been following
ⅠA、ⅡA霍奇金病应采用全淋巴照射的病理类型为()
A.淋巴细胞为主型,混合细胞型
B.淋巴细胞衰减型,混合细胞型
C.淋巴细胞为主型,淋巴细胞衰减型
D.淋巴细胞为主型,结节硬化型
E.淋巴细胞衰减型,结节硬化型