一般规定,如果DJ6型光学经纬仪两个半测回角值之差不超过()时,取其平均值作为一测回的角值。
A.±40″
B.40″
C.±13″
D.13″
参考答案:A
—Could you please tell me _____?
—Oh, Xiangyang, a beautiful ancient city in the northwest of Hubei Province.[ ]
A. where are you from
B. where you are from
C. you are from where
D. are you from where
选煤分厂的岗位工人必须在工作现场交接班,交清()运转状况、存在的问题及应注意事项,并应做好交接班记录。