男性,自幼常发生黄疸,贫血检查证实为遗传性球形细胞增多症,治疗最好采用
A.糖皮质激素B.反复多次少量输血C.脾切除D.酌情应用免疫抑制剂E.可不必治疗
参考答案:C
—Tom is never late for work. Why is he absent today?
—Something _____ to him.[ ]
A. must happen
B. should have happened
C. could have happened
D. must have happened
水平电缆通道中电缆桥架至各处的垂直净距,应满足电缆能方便地敷设和固定,并符合下述()规定?
A.电缆桥架层间:不小于150mm
B.最上一层至构筑物、梁底、电缆沟顶:不小于200mm,并满足电缆弯曲半径的要求
C.最下一层至电缆沟底:不小于l00mm
D.最下一层至厂房内地坪:不小于2000mm