地秤变动性大表现在空秤推刀极边时、承重点检定时示值变动性大且超差,其排除方法是调整各()相互平行并将刀刃磨成平直。
A.刀刃长度
B.刀刃间距
C.刀刃宽度
D.刀刃角度
参考答案:B
—What is your brother like ? —_________
A.He is fine, thank you.
B.He likes doing his homework now.
C.He is friendly and helpful.
D.He is a famous doctor.
特种作业人员上岗前必须接受专门的培训,经考试合格取得()证书,方可上岗作业。
A.大学专科学历
B.执业资格
C.职业技能
D.操作资格