工作场所有害因素职业接触限值中,短时间接触容许浓度指一个工作日内,任何一次接触不得超过的( )min时间加权平均的容许接触水平。
A.16
B.17
C.18
D.15
参考答案:D
“Shipment is to be made in the second half of a month.”means shipment to be made from ( ).
A.the 1st to the 10th
B.the 11th to the 20th
C.the 1st to the 15th
D.the 16th to the last day of such month
教学进度又叫()。
A.学段体育教学计划
B.单元体育教学计划
C.学期体育教学计划
D.学时体育教学计划