金相显微镜(),照明系统,机械系统几部分构成。
参考答案:光学系统
—Hi! My name's Bob. It's my first time to be here.
—_____.[ ]
A. It's my pleasure
B. I'm very pleased
C. It's very kind of you
D. Pleased to meet you
特种作业人员考核不合格的学员,由培训机构在10个工作曰内向考核部门申请补考一次,补考仍不合格的,须()。
A、再补考一次
B、行政罚款
C、批评教育
D、重新培训