受理网点必须要指定专人到发证机关核实其证件真伪的是（）业务
A、正式挂失
B、密码挂失
C、口头挂失
D、大额存款挂失
参考答案：D
关于股疝的叙述，正确的是（）.
A.容易嵌顿
B.疝囊从股环、经股管向股部卵圆窝突出
C.多见于老年男性，常双侧发生
D.平时无症状，多偶然发现
E.疝块呈半球形
A minor heat burn of the eye should be treated by（）.
A.gently flooding with water
B.warming the eye with moist warm packs
C.laying the person flat on his back
D.mineral oil drops directly on the eye
