电缆分支箱本体部件状态量由()导电连接点的相对温差或温升、污秽组成。
A.绝缘电阻
B.放电声
C.凝露
D.积污
参考答案:A, B, C
关于小肝癌的描述,下列哪项是错误的()
A.圆形低回声结节
B.远侧回声可轻度增强
C.可见侧方声影
D.边界清楚
E.周围见较宽的晕环,中心液化呈"牛眼征"
Fire fighting equipment requirements for a particular vessel may be found on the().
A.4Certificate of Inspection
B.Certificate of Seaworthiness
C.Classification Certificate
D.Certificate of Registry