持三类司炉操作证的司炉人员允许操作工作压力小于或等于3.8兆帕的蒸汽锅炉、热水锅炉、有机热载体炉。
1、正确错误
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Yourbikeneeds_____.You‘dbetterdoirightnow.
Williamhascuthissmoking_____tofivecigarettesaday.
正常小儿,身长75cm、体重9kg、头围46cm,其最可能的年龄是()
Studentsshould_____theirowninterestsaswellasdotheirschoolwork.
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