久蹲或吸引时,肛门皮下肿胀,可见曲张的静脉团,不能立即消散。可诊断为()
A.混合痔
B.炎性外痔
C.血栓外痔
D.结缔组织外痔
E.静脉曲张外痔
参考答案:E
. --- Believe it or not, I passed the driving test at the first attempt yesterday.
--- Great! But remember you can never be ___ careful when driving a car in the street.
A.enough
B.rather
C.quite
D.too
锰硅合金生产中,当炉渣碱度由()时,锰的回收率随着碱度的增加而降低
A、0.2增大到0.7~0.8
B、0.4增大到0.82~0.9
C、0.4增大到0.83~0.93
D、0.81增大到0.9以上