各职业鉴定机构组织申报单位鉴定理论考核时，要求编排考场考位是（）人，单人单座。
A、20人
B、40人
C、以培训数人定
D、25人
参考答案：D
Mr. Jenkins has been busy with his work these days and seldom _________ to come over to have a chat with me.
A．has he time
B．does he have time
C．hasn’t he time
D．doesn’t he have time
铆接机本身具有顶钉和铆钉两种结构。
