根据《关于领导干部报告个人有关事项的规定》，报告人未按时报告的，有关纪检监察机关应当督促其报告。（）
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An aircraft has indicated that he wants you to change course and follow him. You cannot comply because of an emergency on board. Which signal should you make?（）
A. Fire a red flare at night or a red smoke signal by day
B. Send the Morse signal "N" by flashing light
C. Make a round turn (360°) and resume course
D. Make an "S" turn (hard right then hard left) and resume course
铅笔铅芯的硬度是指（）。
A. 邵氏硬度
B. 洛氏硬度
C. 努普硬度
D. 巴氏硬度
施工升降机运行时，允许人的头部伸出笼外观察情况。（）
A. 正确
B. 错误
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