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【判断题】
流动式装卸机械作业时，要在作业区关键位置设置安全警示标志，防护人员穿反光防护服、配口笛或对讲机，站立安全位置。非作业人员、设备，不得进入作业区域。
A.
正确
B.
错误
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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】According to a survey, which was based on the responses of over 188,000 students, today’s traditional-age college freshmen are "more materialistic and less altruistic (利他主义的) " than at any time in the...
A.
have never attached so much importance to moral sense
B.
have never been so financially well off as today
C.
have never been so materialistic as today
D.
have never been so interested in the arts
【单选题】According to a survey, which was based on the responses of over 188,000 students, today"s traditional-age college freshmen are "more materialistic and less altruistic (利他主义的 )" than at any time in the...
A.
have never been so materialistic as today
B.
have never been so interested in the arts
C.
have never been so financially well off as today
D.
have never attached so much importance to moral sense